We'll see...their single player hasn't exactly been good so far. I'd rather play a game like Left 4 Dead which has 4-player co-op. Or Too Human, which does that also right? I would hope the graphics would look better for their single player, but if they are doing online co-op I doubt it...
Edit: Oh, and X-men Legends and marvel UA, but you get the point. I believe Rainbow Six does 4-player co-op too?