The trailer confirms Ryu, Wolverine, The Hulk, Morrigan, Iron Man, and Chris Redfield as characters. Aside from the characters revealed in the trailer itself, the silhouettes of the characters near the companies logo appear to be of Viewtiful Joe, Chun-Li, Captain America, and Gambit among those shown in the trailer.
The trailer also reveals that the game is also running on the MT Framework engine, which strongly suggests that it's an Xbox 360 and PS3 title.
The confirmation of Marvel vs Capcom 3 has been meet with open arms by the online community with the overwhelming majority now speculating on if beloved characters such as "Devil May Cry's" Dante will make it in or if the game will feature everyone's favorite merc' with a mouth Deadpool.