Don't trade in that copy of Battlefield 3 just yet.

We're sure a lot of Battlefield 3 owners are looking wistfully at that currently unattainable copy of Call Of Duty: Modern Warfare 3 lingering on the horizon. But EA doesn't want you to leave its game — at least not yet. So it's hedging its bets that this 'Back To Karkand' DLC trailer will keep you hooked on Battlefield 3. At least for the time being.

The add-on is due out in December, and it will launch a week early on PlayStation 3.