First of all, watch the lovely cinematic above. It's dashing! It's brave! It's exciting! Captain America punches the crap out of a helicopter, Chun-Li proves herself worthless, Trish does some bad-ass shooting, Amateratsu and Viewtiful Joe perform some wacky cartoon shenanigans, and everyone is basically super best friends, except for Dr. Doom and Super Skrull. Those guys are dicks.
However! Now that you've watched the clip, did you see! Tron Bonne, the always spoiled, sometimes bad guy character from Mega Man Legends is going to be making a return. This is somewhat of a surprise, as we still don't have Mega Man himself confirmed for the game, and fan speculation indicated she would not be a playable character, considering she was in the background hopping up and down in one of the stages. She was a fan favorite in Marvel vs Capcom 2, and seeing her return will surely please fans of Tron and Servbots alike. Marvel vs Capcom 3: Fate of the Worlds will be coming out sometime next year.