i expect a pokemon game because there's so many on the ds and there's only one on the wii
i think there could be Mario Kart game on the ds because of the new wii game. (Wii-DS Compatability)
Maybe a Smash game because of the popularity it has already got and it hasn't even been released yet.
A new Nintendo franchise
Kawashima has announced a Math Training game for wii
Something new with Sega?
Pikmin 3 (Wii)
Ubisoft announcing a new Red Steel game