Badguy wrote...
I wonder why they don't have Japanese voices for Marvel characters. Not that I would play a Japanese Dr. Doom anyway.
It's probably because it's to cut on the dubbing costs.
Capcom characters are from Japanese originally and have an english version of each game, so it's easy to contact the Actors. while Marvel Characters never got dubbed in Japanese, so it'll increase the Total developing cost just to cast an Actor. Although You have Iron-Man and Wolverine, but they're minority.
License problem is also probability.