BOZ
Creature Cataloguer
ok, with the release of the ToC for the ToH (ToB ToR ToM ToT, etc), we finally know what's going to be yanked off of this site to make the book. and in time, MM2 will also take out a chunk of what remains. and rumors strongly speculate that most if not all of the remaining fiend lords will go into the BoVD. and of course, a few of them are bound to pop up in dragon mag, and various modules and sourcebooks. but, aside from what goes into those WotC products, this here list is what we have left after the ToH.
now, i'm thinking it's a good bet that the MM2 will take berbalang, catoblepas, crimson death, demilich, some of the demons and devils, galeb duhr, the giants, hook horror, ixitxachitl, kenku, khargra, phoenix, sirine, sylph, water weird, and some others. but, in the meantime, here's the list.
you'll notice a few things about it, and some do make sense. just about anything that is Ravenloft, Spelljammer, Forgotten Realms, or other currently and formerly published D&D worlds did not make it into the book. also, most things that were taken from Dragon magazine were also omitted.
Aartuk
Air Sentinel
Asperii
Azmyth
Bat, fire
Behemoth
Beholder-kin (Hive Mother and all her minions)
Beholder-kin, Gauth
Berbalang
Biclops
Blackball
Bloodwight
Boggle
Bone Weird
Bubble
Catoblepas
Chimera, undead
Cildabrin
Clam, giant
Clockwork Horrors
Colossus
Crimson Death
Cyclopskin
Darter
Demilich
Demon, Babau
Demon, Bar-lgura
Demon, Chasme
Demon Prince (Demogorgon)
Demon Prince (Graz’zt)
Demon Lord (Juiblex)
Demon Lord (Zuggtmoy)
Demon Prince (Yeenoghu)
Demon (Queen of Chaos, Miska, and all the spider-demons)
Devil, Amnizu
Devil, Arch (Dispater, Mammon, Belial, Moloch, Baalzebul, Mephistopheles, Asmodeus)
Devil, Duke (Alastor, Baalberith, Baalzephon, Caarcrinolaas, Focalor, Melchon, Zimmimar)
Devil, Princess (Glasya, Baalphegor)
Dire Ape, enhanced
Doom Guard
Dragon, Adamantite
Dragon, Mercury
Dragon, Yellow
Dusanu
Earth Weird
Elemental Lords (Cryonax, Ogremoch, Olhydra, Yan-c-Bin)
Elemental (quasi-mineral elementals)
Eye of Fear and Flame
Eyewing
Feystag
Foulwing
Fungus Hulk
Galeb Duhr
Giants (Firbolg, Formorian, Mountain, Verbeeg)
Giff
Gorynych
Hamster, Giant Space
Haunt
Hollyphant
Hook Horror
Insect Swarm
Ixitxachitl
Jabberwocky
Juggernaut
Kenku
Khargra
Kirre
Krankentua
Lamia Noble
Lammasu, Celestial
Living Wall
Lycanthrope, Werebadger
Maedar
Margoyle
Marrashi
Meenlock
Moon-Horse
Morkoth
Neogi
Oculon
Oonga
Ormyrr
Paraelemental (all ice paras)
Per
Phoenix
Quagmire
Raggamoffyn
Render
Sheens (all)
Sirine
Skuz
Slaad Lords (Chourst and Rennbuu)
Snake, spitting (not in the list, but I bet scott’s got em covered)
Spell Weaver
Sylph
Tirapheg
Tween
Undead Beasts
Vilstrak
Vodyanoi
Vortex
Water Weird
The Wild Hunt
Xador’s Fluid
Yugoloth (Arcanaloth, Hydroloth, Yagnoloth)
Zaratan
Zombie Lord
now, i'm thinking it's a good bet that the MM2 will take berbalang, catoblepas, crimson death, demilich, some of the demons and devils, galeb duhr, the giants, hook horror, ixitxachitl, kenku, khargra, phoenix, sirine, sylph, water weird, and some others. but, in the meantime, here's the list.

Aartuk
Air Sentinel
Asperii
Azmyth
Bat, fire
Behemoth
Beholder-kin (Hive Mother and all her minions)
Beholder-kin, Gauth
Berbalang
Biclops
Blackball
Bloodwight
Boggle
Bone Weird
Bubble
Catoblepas
Chimera, undead
Cildabrin
Clam, giant
Clockwork Horrors
Colossus
Crimson Death
Cyclopskin
Darter
Demilich
Demon, Babau
Demon, Bar-lgura
Demon, Chasme
Demon Prince (Demogorgon)
Demon Prince (Graz’zt)
Demon Lord (Juiblex)
Demon Lord (Zuggtmoy)
Demon Prince (Yeenoghu)
Demon (Queen of Chaos, Miska, and all the spider-demons)
Devil, Amnizu
Devil, Arch (Dispater, Mammon, Belial, Moloch, Baalzebul, Mephistopheles, Asmodeus)
Devil, Duke (Alastor, Baalberith, Baalzephon, Caarcrinolaas, Focalor, Melchon, Zimmimar)
Devil, Princess (Glasya, Baalphegor)
Dire Ape, enhanced
Doom Guard
Dragon, Adamantite
Dragon, Mercury
Dragon, Yellow
Dusanu
Earth Weird
Elemental Lords (Cryonax, Ogremoch, Olhydra, Yan-c-Bin)
Elemental (quasi-mineral elementals)
Eye of Fear and Flame
Eyewing
Feystag
Foulwing
Fungus Hulk
Galeb Duhr
Giants (Firbolg, Formorian, Mountain, Verbeeg)
Giff
Gorynych
Hamster, Giant Space
Haunt
Hollyphant
Hook Horror
Insect Swarm
Ixitxachitl
Jabberwocky
Juggernaut
Kenku
Khargra
Kirre
Krankentua
Lamia Noble
Lammasu, Celestial
Living Wall
Lycanthrope, Werebadger
Maedar
Margoyle
Marrashi
Meenlock
Moon-Horse
Morkoth
Neogi
Oculon
Oonga
Ormyrr
Paraelemental (all ice paras)
Per
Phoenix
Quagmire
Raggamoffyn
Render
Sheens (all)
Sirine
Skuz
Slaad Lords (Chourst and Rennbuu)
Snake, spitting (not in the list, but I bet scott’s got em covered)
Spell Weaver
Sylph
Tirapheg
Tween
Undead Beasts
Vilstrak
Vodyanoi
Vortex
Water Weird
The Wild Hunt
Xador’s Fluid
Yugoloth (Arcanaloth, Hydroloth, Yagnoloth)
Zaratan
Zombie Lord