Activision has released a video that shows the DLC Content Collection # 1 of Call of Duty: Modern Warfare 3. In the movie Robert Bowling of Infinity Ward and Michael Condrey of Sledgehammer Games show us the three new multiplayer maps ( Liberation square, Overwatch) and two new Spec Ops ( Black Ice , Negotiator) previously released only for users Elite Premium . The DLC will be available by March 20 on Xbox Live: below the video.