DICE has recently released a BF3 Premium-exclusive video of their upcoming DLC, "Aftermath". The maps are set to be centered in post-earthquake environments in an urban setting (most likely in Iran). This DLC will include 4 new maps, a new game mode, new vehicles, new assignments, and new achievements. This DLC pack will be available in December 2012.
I suggest that you sign in on Battlelog before you click the link below to access the video.
Video: Premium - Battlelog / Battlefield 3