Battlefield 3: Armored Kill is the next expansion back for, we won't insult your intelligence. It's out in September. We have some lovely, killy footage of it. We are also told that - and this is official guff:
"Armored Kill features 5 new drivable vehicles including mobile artillery, tanks, ATV's complete with over 20 vehicle specific unlocks. Players will also have the ability to spawn in the all-new gunship and rain death from above... it also introduces a brand new mode (called), Tank Superiority, where heavy vehicles clash in order to control key areas of the map."