Clothes Make the Hero
One of the nice little touches of the previous two Ultimate Alliance games was that each character had their own alternate costumes to wear. It wasn’t absolutely vital to have them, but if you preferred say, the look of Ultimate Wolverine over his typical t-shirt and jeans, or wanted to pretend you were Symbiote Spider-Man rather than classic red and blue, you could do that. They were nice little threads that acknowledged a hero’s specific history, and also served as an example of how far we’ve come. (I see you, ugly yellow and red Daredevil costume.)
Obviously, this has to return for the third game, but with more costumes. The previous two games gave you a total of four costumes–one main and three alternates–but why not go bigger? That’s not to say that these alternate skins for each character should reflect literally every aspect of their history, because that’d be outright ridiculous for a lot of these guys. Just saying, four is a little slim for the cast of heroes we’ve got on hand.