VIDEO 15 minutes of new Dragon Age Tresspasser DLC
This content has a unique spin to it, taking in events a full two years after the end of the original game. That means you'll definitely have to have completed Inquisition first, but you've had a year at this stage so that should be no excuse! You'll play once more as the Inquisitor, with the main action being reconnecting with your allies in the face of Qunari invasion.
IGN has been playing Tresspasser and you can see the first 15 minutes below.