The Stimulus Package will have a 30 day timed exclusivity deal for Xbox360 version, plus confirmation of old maps as DLC. (nextgengamingblog.com)
DLC 3 is listed for a July 2nd release while the fourth and final DLC will be supposedly arriving on the 27th of August, both these release dates are for the Xbox 360 versions, PS3 and PC users get the DLC after a month of course thanks to Microsoft's DLC timed exclusivity deal with Activision. (gearnuke.com)
I'm sure Sony has some sort of timed exclusivity deal though mobile versions could also do well. (gimmegimmegames.com)