DICE has announced that Battlefield 3 Premium members will be able to access a teaser trailer for the upcoming Endgame DLC. The trailer will go live in the Premium section of Battlelog on December 21 and will show clips of the new maps as well as vehicles such as the motorcycle. The DLC will include 4 new maps, new vehicles and a new game mode which are all currently unknown.
The Endgame DLC for Battlefield 3 currently does not have a solid release date but is set to release soemtime in March of next year.