Marvel Super Hero Squad does have a few redeeming qualities. The boss battles are different, composed of an arena style brawl on a raised platform. The first team to 10 points, scored via KOs or ring outs, wins. These battles are probably the best part of the game. In fact, an entire mode of the game is devoted to these arenas.
Considering the flaws of the co-op campaign, most of the enjoyment of the game will come from these fights, which support up to four players. You won't get a Smash Brothers Brawl level experience from it, but it is at least tolerable, which is more than one can say about the rest of Marvel Super Hero Squad.