Any kinds of games really,sequels,ports,remakes,or other.
I so wanted them to make a Viewtiful Joe game for it after the DS one,they could've made it awesome!
Geist 2,F-ZERO,Starfox,Wario World 2,enhanced DBZ Budokai 3(or DB Heroes),a DBZ exclusive(OTHER than DB Revenge of King Piccolo).
I wanna add: Portal/Portal 2,(& Half Life 2,duh!),a DMC game,MORE Silent Hill games.