To the previous poster who wanted a single class smackdown, most of the first smackdowns are single class. Paladin, Rogue, Cleric, etc... As to the reason they are less frequent now, is because we have more resources at our disposal. To truly maximize the capabilities of a concept, you must use all your tools.

But they are there on the first page at the top if you want.
As to Corlon, you've got a couple of problems.

But that's ok, all smackdowns do, and they need a few revisions at first.
First, again, this is just another time stop/summon monster routine.
Second, you've only got so many 8th level spells available to you at 16th level. Probably only 3. If you are suggesting you use rings of wizardry to double that, you've got a couple of problems. First, DMG rings of wizardry don't extend that high, I suppose a DM could allow you to make one, but doubling 8th level slots is dangerous enough that he probably wouldn't. Second, it wouldn't help anyways with your super summons, see the next problem.
Third, the super summon from the Summoner prestige class you refer to (and I should know, Collin in my story hour is one), does allow you to use one of your bonus metamagic feats without spell slot increase, but only on a domain-spell-like extra slot you get at each spell level. Meaning at 16th level, you've got one 8th level, one 7th level, one 6th level, and so on.
Also, maximize or twin spell might work better since summon monster spells take a full round to cast and cannot be quickened.
Finally, what is the unique idea of this smack? Using the super summons? What creatures would you summon, how would you use them? Have you got any spells to make them work better? Feats? Magical items? Rings of Blue Conjures, Augment Summoning, Mass Haste, Contingency, they could all make this smack better.
Taking one level of psion and blowing through psionic time stop scrolls is something just about any smack could add. We generally avoid doing scroll dependant smackdowns because it means you can only do it once. And because it isn't your own talents you are using, but the talents of the person who made the scroll (or power stone in this case).
I suppose you could make a 6th level smackdown (because of the spellcraft and intelligence requirements) where in a wizard cast time stop from a scroll, two meteor swarms from scrolls, then another time stop from a scroll, then two more meteor swarms, but that's not very fun is it?
Perhaps some revisions could make your smackdown more enjoyable.
