Spidre-Man: Shattered Dimensions has four different Spider-Men (Spider-Mans?) in it. That's just Crazyville, people. Four! Well, guess what. We're moving to Crazy City where there are ten different Spider... people. OK, six of them are just bonus costumes, and won't play any differently, but having them in there to cover an even wider array of Spidey styles is pretty awesome.
At SDCC it was revealed that GameStop and Amazon.com would receive exclusive costumes in the form of of Spider-Man's cosmic costume and the futuristic "Iron Spider" get up. In the meantime Best Buy will deliver the pretty obscure Negative Zone costume while K-Mart is getting the Scarlet Spider outfit. Also unlockable in the game will be a Mangaverse style Spidey (first time in games) and some Spider-Armor.
They all sure look stylish, but I think I'd want to swing for the Scarlet Spider outfit despite the fact that I would have to go to a Kmart to get it.