Well, since we never got official versions of the other two Nehaschimic Dragon types mentioned in the Epic Bestiary (Volume 1), and since I had experience working out the numbers for such a beast (namely, the Firmament/Brane Dragon), I decided to make versions of the Black Hole Dragon and Quasar Dragon for my own use. I'm not sure how closely my versions will/do match what UK himself had in mind for them; these are my own creations based on the clues I have (mostly, the lines mentioning them in the Bestiary). Hopefully other people who wanted to see them will find these useful- and if UK is willing to specify how his versions are different, perhaps we'll have official 3.5 versions yet. 
Since UK's moving on to all-4E design, and doesn't seem to have started much dragon work yet given how the first monster book is a Vampire Bestiary, I trust I'm not stepping on any toes here. My versions are of course 3.5 since that's what I run (more or less).
Singularity Dragon
Black Hole Dragon
Macro-Tiny Dragon (Extraplanar)
Environment: Any (usually deep space)
Organization: Solitary
Challenge Rating: Wyrmling 512; Very Young 536; Young 560; Juvenile 584; Young Adult 608; Adult 632; Mature Adult 656; Old 680; Very Old 704; Ancient 728; Wyrm 752; Great Wyrm 776
Treasure: None
Alignment: Always Neutral
Advancement: Wyrmling 513-535 HD (Macro-Tiny); Very Young 537-559 HD (Macro-Tiny); Young 561-583 HD (Macro-Tiny); Juvenile 585-607 HD (Macro-Tiny); Young Adult 609-631 HD (Macro-Tiny); Adult 633-655 HD (Macro-Tiny); Mature Adult 657-679 HD (Macro-Tiny); Old 681-703 HD (Macro-Tiny); Very Old 705-727 HD (Macro-Tiny); Ancient 729-751 HD (Macro-Tiny); Wyrm 753-775 HD (Macro-Tiny); Great Wyrm 777-799 HD (Macro-Tiny); Great-Great Wyrm 801-823 HD (Macro-Tiny)
Level Adjustment: Wyrmling +256; Very Young +268; Young +280; Juvenile +292; Young Adult +304; Adult +316; Mature Adult +328; Old +340; Very Old +352; Ancient +364; Wyrm +376; Great Wyrm +388
As the singularity draws closer, space pinching itself out of existence in front of you, you get the unnerving impression of motion. With time pinching out along with the space ahead, the vast singularity is all you can see before you, expanding to fill all the existence you have left. It is not until you notice the suspicious regularity of the six lobes of the "accretion disk" (could those be... wings?) that you recognize the serpentine shape of the event horizon itself- which is now unfolding and extending a large forward portion like some sort of mouth or head- towards you. By then, you realize, it is far too late.
<table style="font-size: small;" title="Singularity Dragons By Age" border="1"><tbody><tr><th colspan="11" align="left">Singularity Dragons By Age</th></tr><tr><th align="left" valign="bottom">Age</th><th valign="bottom">Size</th><th align="left" valign="bottom">Hit Dice (hit points)</th><th align="left" valign="bottom">AC</th><th valign="bottom">Base Attack/Grapple</th><th valign="bottom">Attack</th><th valign="bottom">Fort Save</th><th valign="bottom">Ref Save</th><th valign="bottom">Will Save</th><th align="left" valign="bottom">Breath Weapon</th><th valign="bottom">Mind Warp DC</th></tr><tr><td valign="top">Wyrmling</td><td align="center" valign="top">Ma-T</td><td valign="top">512d1000+8,192 (520,192 hp)</td><td valign="top">649 (-128 size, +128 deflection, +64 divine, +64 gravitic mastery, +511 natural)</td><td align="center" valign="top">+512/
+712</td><td align="center" valign="top">+552</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+514</td><td valign="top">24d20 HD (DC 410)</td><td align="center" valign="top">522</td></tr><tr><td valign="top">Very Young</td><td align="center" valign="top">Ma-T</td><td valign="top">536d1000+11,792 (547,792 hp)</td><td valign="top">709 (-128 size, +132 deflection, +80 divine, +80 gravitic mastery, +535 natural)</td><td align="center" valign="top">+536/
+772</td><td align="center" valign="top">+612</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+564</td><td valign="top">25d20 HD (DC 460)</td><td align="center" valign="top">570</td></tr><tr><td valign="top">Young</td><td align="center" valign="top">Ma-T</td><td valign="top">560d1000+15,680 (575,680 hp)</td><td valign="top">769 (-128 size, +136 deflection, +96 divine, +96 gravitic mastery, +559 natural)</td><td align="center" valign="top">+560/
+832</td><td align="center" valign="top">+672</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+614</td><td valign="top">26d20 HD (DC 510)</td><td align="center" valign="top">618</td></tr><tr><td valign="top">Juvenile</td><td align="center" valign="top">Ma-T</td><td valign="top">584d1000+19,856 (603,856 hp)</td><td valign="top">829 (-128 size, +140 deflection, +112 divine, +112 gravitic mastery, +583 natural)</td><td align="center" valign="top">+584/
+892</td><td align="center" valign="top">+732</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+664</td><td valign="top">27d20 HD (DC 560)</td><td align="center" valign="top">666</td></tr><tr><td valign="top">Young Adult</td><td align="center" valign="top">Ma-T</td><td valign="top">608d1000+24,320 (632,320 hp)</td><td valign="top">889 (-128 size, +144 deflection, +128 divine, +128 gravitic mastery, +607 natural)</td><td align="center" valign="top">+608/
+952</td><td align="center" valign="top">+792</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+714</td><td valign="top">28d20 HD (DC 610)</td><td align="center" valign="top">714</td></tr><tr><td valign="top">Adult</td><td align="center" valign="top">Ma-T</td><td valign="top">632d1000+29,072 (661,072 hp)</td><td valign="top">949 (-128 size, +148 deflection, +144 divine, +144 gravitic mastery, +631 natural)</td><td align="center" valign="top">+632/
+1012</td><td align="center" valign="top">+852</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+764</td><td valign="top">29d20 HD (DC 660)</td><td align="center" valign="top">762</td></tr><tr><td valign="top">Mature Adult</td><td align="center" valign="top">Ma-T</td><td valign="top">656d1000+34,112 (690,112 hp)</td><td valign="top">1009 (-128 size, +152 deflection, +160 divine, +160 gravitic mastery, +655 natural)</td><td align="center" valign="top">+656/
+1072</td><td align="center" valign="top">+912</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+814</td><td valign="top">30d20 HD (DC 710)</td><td align="center" valign="top">810</td></tr><tr><td valign="top">Old</td><td align="center" valign="top">Ma-T</td><td valign="top">680d1000+39,440 (719,440 hp)</td><td valign="top">1069 (-128 size, +156 deflection, +176 divine, +176 gravitic mastery, +679 natural)</td><td align="center" valign="top">+680/
+1132</td><td align="center" valign="top">+972</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+864</td><td valign="top">31d20 HD (DC 760)</td><td align="center" valign="top">858</td></tr><tr><td valign="top">Very Old</td><td align="center" valign="top">Ma-T</td><td valign="top">704d1000+45,056 (749,056 hp)</td><td valign="top">1129 (-128 size, +160 deflection, +192 divine, +192 gravitic mastery, +703 natural)</td><td align="center" valign="top">+704/
+1192</td><td align="center" valign="top">+1032</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+914</td><td valign="top">32d20 HD (DC 810)</td><td align="center" valign="top">906</td></tr><tr><td valign="top">Ancient</td><td align="center" valign="top">Ma-T</td><td valign="top">728d1000+50,960 (778,960 hp)</td><td valign="top">1189 (-128 size, +164 deflection, +208 divine, +208 gravitic mastery, +727 natural)</td><td align="center" valign="top">+728/
+1252</td><td align="center" valign="top">+1092</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+964</td><td valign="top">33d20 HD (DC 860)</td><td align="center" valign="top">954</td></tr><tr><td valign="top">Wyrm</td><td align="center" valign="top">Ma-T</td><td valign="top">752d1000+57,152 (809,152 hp)</td><td valign="top">1249 (-128 size, +168 deflection, +224 divine, +224 gravitic mastery, +751 natural)</td><td align="center" valign="top">+752/
+1312</td><td align="center" valign="top">+1152</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+1014</td><td valign="top">34d20 HD (DC 910)</td><td align="center" valign="top">1002</td></tr><tr><td valign="top">Great Wyrm</td><td align="center" valign="top">Ma-T</td><td valign="top">776d1000+63,632 (839,632 hp)</td><td valign="top">1309 (-128 size, +172 deflection, +240 divine, +240 gravitic mastery, +775 natural)</td><td align="center" valign="top">+776/
+1372</td><td align="center" valign="top">+1212</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+1064</td><td valign="top">35d20 HD (DC 960)</td><td align="center" valign="top">1050</td></tr></tbody></table>

Since UK's moving on to all-4E design, and doesn't seem to have started much dragon work yet given how the first monster book is a Vampire Bestiary, I trust I'm not stepping on any toes here. My versions are of course 3.5 since that's what I run (more or less).
Singularity Dragon
Black Hole Dragon
Macro-Tiny Dragon (Extraplanar)
Environment: Any (usually deep space)
Organization: Solitary
Challenge Rating: Wyrmling 512; Very Young 536; Young 560; Juvenile 584; Young Adult 608; Adult 632; Mature Adult 656; Old 680; Very Old 704; Ancient 728; Wyrm 752; Great Wyrm 776
Treasure: None
Alignment: Always Neutral
Advancement: Wyrmling 513-535 HD (Macro-Tiny); Very Young 537-559 HD (Macro-Tiny); Young 561-583 HD (Macro-Tiny); Juvenile 585-607 HD (Macro-Tiny); Young Adult 609-631 HD (Macro-Tiny); Adult 633-655 HD (Macro-Tiny); Mature Adult 657-679 HD (Macro-Tiny); Old 681-703 HD (Macro-Tiny); Very Old 705-727 HD (Macro-Tiny); Ancient 729-751 HD (Macro-Tiny); Wyrm 753-775 HD (Macro-Tiny); Great Wyrm 777-799 HD (Macro-Tiny); Great-Great Wyrm 801-823 HD (Macro-Tiny)
Level Adjustment: Wyrmling +256; Very Young +268; Young +280; Juvenile +292; Young Adult +304; Adult +316; Mature Adult +328; Old +340; Very Old +352; Ancient +364; Wyrm +376; Great Wyrm +388
As the singularity draws closer, space pinching itself out of existence in front of you, you get the unnerving impression of motion. With time pinching out along with the space ahead, the vast singularity is all you can see before you, expanding to fill all the existence you have left. It is not until you notice the suspicious regularity of the six lobes of the "accretion disk" (could those be... wings?) that you recognize the serpentine shape of the event horizon itself- which is now unfolding and extending a large forward portion like some sort of mouth or head- towards you. By then, you realize, it is far too late.
<table style="font-size: small;" title="Singularity Dragons By Age" border="1"><tbody><tr><th colspan="11" align="left">Singularity Dragons By Age</th></tr><tr><th align="left" valign="bottom">Age</th><th valign="bottom">Size</th><th align="left" valign="bottom">Hit Dice (hit points)</th><th align="left" valign="bottom">AC</th><th valign="bottom">Base Attack/Grapple</th><th valign="bottom">Attack</th><th valign="bottom">Fort Save</th><th valign="bottom">Ref Save</th><th valign="bottom">Will Save</th><th align="left" valign="bottom">Breath Weapon</th><th valign="bottom">Mind Warp DC</th></tr><tr><td valign="top">Wyrmling</td><td align="center" valign="top">Ma-T</td><td valign="top">512d1000+8,192 (520,192 hp)</td><td valign="top">649 (-128 size, +128 deflection, +64 divine, +64 gravitic mastery, +511 natural)</td><td align="center" valign="top">+512/
+712</td><td align="center" valign="top">+552</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+514</td><td valign="top">24d20 HD (DC 410)</td><td align="center" valign="top">522</td></tr><tr><td valign="top">Very Young</td><td align="center" valign="top">Ma-T</td><td valign="top">536d1000+11,792 (547,792 hp)</td><td valign="top">709 (-128 size, +132 deflection, +80 divine, +80 gravitic mastery, +535 natural)</td><td align="center" valign="top">+536/
+772</td><td align="center" valign="top">+612</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+564</td><td valign="top">25d20 HD (DC 460)</td><td align="center" valign="top">570</td></tr><tr><td valign="top">Young</td><td align="center" valign="top">Ma-T</td><td valign="top">560d1000+15,680 (575,680 hp)</td><td valign="top">769 (-128 size, +136 deflection, +96 divine, +96 gravitic mastery, +559 natural)</td><td align="center" valign="top">+560/
+832</td><td align="center" valign="top">+672</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+614</td><td valign="top">26d20 HD (DC 510)</td><td align="center" valign="top">618</td></tr><tr><td valign="top">Juvenile</td><td align="center" valign="top">Ma-T</td><td valign="top">584d1000+19,856 (603,856 hp)</td><td valign="top">829 (-128 size, +140 deflection, +112 divine, +112 gravitic mastery, +583 natural)</td><td align="center" valign="top">+584/
+892</td><td align="center" valign="top">+732</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+664</td><td valign="top">27d20 HD (DC 560)</td><td align="center" valign="top">666</td></tr><tr><td valign="top">Young Adult</td><td align="center" valign="top">Ma-T</td><td valign="top">608d1000+24,320 (632,320 hp)</td><td valign="top">889 (-128 size, +144 deflection, +128 divine, +128 gravitic mastery, +607 natural)</td><td align="center" valign="top">+608/
+952</td><td align="center" valign="top">+792</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+714</td><td valign="top">28d20 HD (DC 610)</td><td align="center" valign="top">714</td></tr><tr><td valign="top">Adult</td><td align="center" valign="top">Ma-T</td><td valign="top">632d1000+29,072 (661,072 hp)</td><td valign="top">949 (-128 size, +148 deflection, +144 divine, +144 gravitic mastery, +631 natural)</td><td align="center" valign="top">+632/
+1012</td><td align="center" valign="top">+852</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+764</td><td valign="top">29d20 HD (DC 660)</td><td align="center" valign="top">762</td></tr><tr><td valign="top">Mature Adult</td><td align="center" valign="top">Ma-T</td><td valign="top">656d1000+34,112 (690,112 hp)</td><td valign="top">1009 (-128 size, +152 deflection, +160 divine, +160 gravitic mastery, +655 natural)</td><td align="center" valign="top">+656/
+1072</td><td align="center" valign="top">+912</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+814</td><td valign="top">30d20 HD (DC 710)</td><td align="center" valign="top">810</td></tr><tr><td valign="top">Old</td><td align="center" valign="top">Ma-T</td><td valign="top">680d1000+39,440 (719,440 hp)</td><td valign="top">1069 (-128 size, +156 deflection, +176 divine, +176 gravitic mastery, +679 natural)</td><td align="center" valign="top">+680/
+1132</td><td align="center" valign="top">+972</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+864</td><td valign="top">31d20 HD (DC 760)</td><td align="center" valign="top">858</td></tr><tr><td valign="top">Very Old</td><td align="center" valign="top">Ma-T</td><td valign="top">704d1000+45,056 (749,056 hp)</td><td valign="top">1129 (-128 size, +160 deflection, +192 divine, +192 gravitic mastery, +703 natural)</td><td align="center" valign="top">+704/
+1192</td><td align="center" valign="top">+1032</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+914</td><td valign="top">32d20 HD (DC 810)</td><td align="center" valign="top">906</td></tr><tr><td valign="top">Ancient</td><td align="center" valign="top">Ma-T</td><td valign="top">728d1000+50,960 (778,960 hp)</td><td valign="top">1189 (-128 size, +164 deflection, +208 divine, +208 gravitic mastery, +727 natural)</td><td align="center" valign="top">+728/
+1252</td><td align="center" valign="top">+1092</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+964</td><td valign="top">33d20 HD (DC 860)</td><td align="center" valign="top">954</td></tr><tr><td valign="top">Wyrm</td><td align="center" valign="top">Ma-T</td><td valign="top">752d1000+57,152 (809,152 hp)</td><td valign="top">1249 (-128 size, +168 deflection, +224 divine, +224 gravitic mastery, +751 natural)</td><td align="center" valign="top">+752/
+1312</td><td align="center" valign="top">+1152</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+1014</td><td valign="top">34d20 HD (DC 910)</td><td align="center" valign="top">1002</td></tr><tr><td valign="top">Great Wyrm</td><td align="center" valign="top">Ma-T</td><td valign="top">776d1000+63,632 (839,632 hp)</td><td valign="top">1309 (-128 size, +172 deflection, +240 divine, +240 gravitic mastery, +775 natural)</td><td align="center" valign="top">+776/
+1372</td><td align="center" valign="top">+1212</td><td align="center" valign="top">n/a</td><td align="center" valign="top">n/a</td><td align="center" valign="top">+1064</td><td valign="top">35d20 HD (DC 960)</td><td align="center" valign="top">1050</td></tr></tbody></table>
Last edited: