A Capcom vs. game would be fun, be it Nintendo or some other company
Super Mario Boards
Roserade
BigBoom1946
How about Capcom vs Sega? It would be fun seeing the Blue Bomber and Blue Blur interact outside of the comics.
Zdrmonster Productions
A Pokécentric Mario Party clone?
BigBoom1946
Maybe a Zelda fighting game?
R.O.B
All good ideas, got to think which one to do first