Following up Marvel Ultimate Alliance, part 2 is being released today (9/15 for 360, ps3, wii, psp, ds) and this time around, Civil War is the theme. This sequel improved from its predecessor the moment it added the feature to team-up in a party of 4 friends online and play through co-op mode missions. It includes over 24 playable characters, combine Super Hero powers for 250 devastating combos (Human Torch/Thor = fiery tornado) and fully destructible environments allow you to demolish everything in your path.
"The Marvel Universe is being torn apart. The Superhuman Registration Act becomes law and Super Heroes must register as weapons of mass destruction, becoming licensed government agents. As Civil War is stirred, Iron Man leads the Pro-Registration side while Captain America spearheads the stand on Anti-Registration. The enemies you battle and the missions you accomplish depend on which side you choose."
Screenshots courtesy of Gamespot