Rumor: Full Marvel vs. Capcom 3 Roster Revealed
Here's what he found:
Marvel
Spider-Man, Hulk, Magneto, Wolverine, Shuma-Gorath, Mr Fantastic, Iron Man, Deadpool, War Machine, Thor, X-23, Dr. Doom, She Hulk, Emma Frost, Super Skrull, Captain America, Taskmaster, Elektra, Juggernaut
Capcom
Ryu, Chun-li, Chuck, Spencer, Dante, Trish, Chris, Morrigan, Arthur, Amaterasu , Albert Wesker, Viewtiful Joe, Mike Haggar, Zero, Tron Bonne, Hsien-Ko, Akuma, Felicia
The list doesn't seem entirely implausible. Although a certain blue bomber is strangely missing, even though Zero and Tron Bonne are there. I would find it odd for Mega Man not to be in this game, but I suppose it's not outside the realm of possibility. Still, given the source and the lack of any official confirmation, take this one with a big grain of salt. I've contacted Capcom for details, but expect a "no comment on rumors or speculation" kind of thing.