Update: The Call of Duty MW3 content calendar has now been changed, find the most update post here: http://www.callofdutymappacks.com/news/mw3-content-calendar-has-changed-21-content-drops-of-dlc-coming/
Original post: As we’ve known for some time now, there is going to be 20 drops of DLC content for Elite subscribers over a 9 month period (Starting in january with the first two).
It’s been mentioned multiple times that Infinity Ward wants to offer more than just new multiplayer maps through their DLC releases. The timeline shows that we have 6 new Spec Ops missions and 2 new game modes to look forward to.
According to the official timeline posted here, this is how the coming months will pan out: January: Two multiplayer maps (Piazza and Liberation) Feburary: One multiplayer map March: One multiplayer map and two Spec Ops missions April: Two multiplayer maps May: One multiplayer map and one Spec Ops mission June: One multiplayer map, one Spec Ops mission and a new game mode July: Two multiplayer maps August: One multiplayer map, one Spec Ops mission and a new game mode September: One multiplayer map and one Spec Ops mission
This is only for Elite Premium members though. 4 – 6 drops will later form a content map pack which will then be released to all non premium memebers, it’s likely this will not be for a while though.