The DLC follows Tallis and Hawke as they attempt to steal a jewel called the "Heart of the Many", which sounds like some Indiana Jones stuff to me, lets just hope for no aliens. Mark of the Assassin will highlight stealth gameplay, and features new items, environments, and monsters, as well as new info about the Orlesians and Qunari.
Mark of the Assassin will be integrated into the regular Dragon Age II game, and can be accessed once you reach your house in Kirkwall. The pricing for the DLC has not yet been announced. Bank on it being somewhere in the $10 to $15 price range.
By John Stanhope