Warhammer 40K: Space Marine looks like it may be receiving some DLC pretty soon due to a tweet on the the game's official Twitter account.
The twitter post said this, "We have a big metal surprise coming to @SpaceMarine in January – Merry Christmas from Relic." In addition to the tweet, Relic also posted a picture of a space marine in a duel with a Dreadnought, a beastly and always dangerously armed mech unit.
If those two hints mean anything, it looks like a new DLC is in the works and likely to be announced in January. Warhammer 40K: Space Marine was released on September 6 of this year.
