Relic Teases Possible Dreadnought For Space Marine
Relic just tweeted the image you see here with the text, "We have a big metal surprise coming to @SpaceMarine in January – Merry Christmas from Relic!".
Assorted message boards seem pretty convinced that this means a future update will feature the Dreadnought at some capacity. According to the Warhammer 40.000 Wikia, "When the greatest of their number fall in battle and they are experienced enough to be considered invaluable to their Chapter, then their body will be repaired and transferred into the armoured cybernetic sarcophagus of a Dreadnought if there is even a spark of life left in them."
I'm not entirely sure how that will be implemented into gameplay, but it sounds pretty cool to me.