Dragon Age Origins has only been out a few weeks and it has already seen two DLCs. With "The Stone Prisoner" and "Warden's Keep" already grabbing over one million in sales, a third DLC seems inevitable. That third DLC is on its way for the holiday season. It's called "Return to Ostagar" and will cost you 400 BioWare points on the PC.
The official site has a few details up about the DLC:
Your memories of the battle of Ostagar will haunt you for years to come. It laid waste to your order and claimed the lives of many great men and women.
Now, there are rumors that a fellow survivor of the battle has escaped from captivity and is seeking the Grey Wardens' help. The time has come for the Grey Wardens to make their return to Ostagar and exact their revenge upon the darkspawn.