Warhammer 40K: Space Marine will receive a "big metal surprise" in January, according to the game's official Twitter feed. Game Informer took note of the tweet and its accompanying picture of a space marine (SPACE MARINE!) serving the eternal will of The Emperor against a Dreadnought.
As fans of the Warhammer 40K universe and Relic's Dawn of War RTS know, the Dreadnought is actually a battle sarcophagus, where the barely living body of an invaluable warrior is entombed to live out existence in the massive armed mech.
Relic gave no indication of how the Dreadnought will be added to the game, but expect some kind of DLC announcement come January.