Activision has confirmed that Call of Duty: Black Ops 2 will be released November 13, 2012 on the PC, PlayStation 3, and Xbox 360.
Black Ops 2 is being developed by Treyarch, who previously developed Call of Duty 3, Call of Duty: World at War and Call of Duty: Black Ops. [1]
At its press conference at E3 2012, Microsoft confirmed that all DLC for Call of Duty: Black Ops 2 will come to Xbox 360 first as a timed exclusive as with previous iterations.
No precise amount of time was revealed, but previous Call of Duty DLC was exclusive to Xbox Live for a period of 30 days.