VGFacts

Here's my idea: Megaman: Battle Universe. A crossover fighting game with all of the Megaman franchises. Plus it'd be fun to have several Mega Mans (Men?) in the same game.

Classic:
Megaman
Protoman
Bass
Cutman
Gutsman
Duo
Dr. Wily in some kind of robot

X:
Megaman X
Zero
Maverick Zero
Axl
Sigma
Colonel
Vile
Dynamo
Magma Dragoon

Megaman Legends:

Megaman Volnutt
Megaman Juno
Mistress Sera
Tron Bonne

Battle Network:
Megaman. EXE
Protoman. EXE
Gutsman.EXE
Roll
Shademan.EXE
Bass.EXE

Megaman Zero:
Zero
Copy X

ZX:
Megaman ZX

Star Force:
Geo
Lyra
Solo
Gemini