Further team interaction is encouraged with fusion attacks, where two characters join together (not literally) to give villains a proper kicking. Mr. Fantastic can sock an enemy into the air, where Human Torch can frazzle him before he even touches the ground. However, if you%26rsquo;re looking for the real character interplay you%26rsquo;re going to want to play the game with four player co-op. Players can drop in and out of play with a simple push of a button, allowing for another slice of four player bashery that proved to be one of the more redeeming aspects of the otherwise struggling Marvel Ultimate Alliance.