I like the art style, the way it breaks the fourth wall and the combos. Im not to sure about the camera movements though. I will say this looks like a fantastic co-op game.
I thought they announced they would not be having co-op story mode, in a game informer issue (the one with Grayson on it)
But in a game-play video, it looked like there was a Mode similar to Firefight in Halo.