Microsoft has released the first details since the E3 announcement of Crackdown 2. The details are slim, but they at least answer some questions about the game.
Microsoft has confirmed on their official Xbox site that Crackdown 2 will in fact have a single player component. On the multiplayer side, it will include 16 player competitive multiplayer and a 4 player co-op mode.
Not much more information is known at this time other than it is being developed exclusively for the Xbox 360 and it will be released sometime in 2010.