Nothing on the Wii side until Skyward Sword and Kirby Wii (should've just called it Kiirby or KirbWii).
For the DS, maybe Spiderman: Edge of Time (Web of Shadows and Shattered Dimensions were good), maybe X-Men Destiny if they make it decent for the DS. Devil Survivor 2 is alright, would've wanted a Strange Journey 2 though. Then there's DQM: J2, maybe Kirby Mass Attack.
Nothing really on the 3DS side that I can't just play elsewhere.
EDIT: Some 3DS elaboration.
- Spiderman: Edge of Time: I have a feeling the 3DS will suffer from being, surprisingly, too powerful for its own good in this respect. It'll suffer from a lot of downporting of console versions and end up getting shitty versions. The DS got some decent to good exclusive versions of multiplats at least.
- Devil Survivor Overclocked: The original game was fun enough but definitely not any better than Persona (2 of which are currently on the PSP, the second game is getting localized soon-ish) or Strange Journey. And a remake of it this early seems kinda silly. I'll stick to a new game in Devil Survivor 2.
- RE: The Mercs: Didn't like the original mode, don't think I'll like this. And no Leon is a spit in the face. I FUCKING LOVE THAT BOWL CUT.
- MGS3D: They kinda ruined my expectations with the game by making it basically look like a lazy port with 3D. It didn't look anything like the Naked Snake demo (which looked great). Already got the PS2 version and it seems incredibly stupid to launch this game at $40 when there's an HD collection for this game plus two others coming out for probably a decently comparable price (even at $60 it's a better bargain).
- Tales of the Abyss: I can live with without a Tales game.
- Tekken 3D: Already got Dark Resurrection and Tekken 6 on the PSP, no reason to buy a 3DS for another one. I was never a really big fan of them anyway, only 3D fighter I really enjoy is Soul Caliber.