As of right now, you've got four days until pre-orders for Dragon Age 2 shrivel and return to their normal state; as previously noted, the "Signature Edition" of DA2 only exists as a bonus for folks pre-ordering before January 12. And with that Signature Edition comes "The Exiled Prince," a free DLC quest and character that both seem hinged on revenge.
If you decide to skip the Signature Edition, the DLC will become available for 560 MS Points ($7) at some point after DA2's release this March. Head past the break for a trailer of The Exiled Prince, distributed by EA Germany (hence the subtitles).