Wow, I was reading some more comments, and I have to say that people are quite pessimistic about this. Think about this, the game may be focused on coop, but there is also a competitive system being made. We don't know anything about it. But then again, if you look at halo and how successful the forge was, my guess would be that forge will hold a place somewhere in this system hopefully. (Or it might come in a later game)