Dragon Age: Origins - Return to Ostagar Q&A

GameZone has kicked up a very short Q&A with Dragon Age: Origins executive producer Mark Darrah about the game's soon-to-be-released Return to Ostagar DLC, among other things. There isn't much to look at, so I'll quote the two most informative answers:
Question: With so many mysteries and story threads left hanging, what made you choose the return to the battle that really launched the game?

Mark: There are a lot of questions left unanswered in the Battle of Ostagar. This is the pivotal moment when your character truly becomes a Grey Warden (really THE Grey Warden). As a result, it is emotionally powerful to investigate the aftermath of the conflict further.

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Will this always be a single-player experience or is there a possibility for assisted cooperative gameplay down the line?

Mark: There is definitely room in the franchise to explore multiplayer story telling.