Call of Duty: Black Ops 2, Uprising, which will be hitting Xbox Live Marketplace on the 16th April 2013. Other platforms will receive it later.
The DLC will include four new multiplayer maps, but the biggest feature of the DLC is the "Mob of the Dead" expansion in which four criminals in 1920's Alcatrax find themselves in the midst of a zombie uprising. The jailbirds are played by four Hollywood actors: Ray Liotta, Chazz Palminteri, Joe Pantoliano, and Michael Madsen.
According to the press release, "In order to survive, players must work their way through the steel cells and aging concrete buildings while fighting off a multitude of zombified prisoners and guards trapped on the island with them. Additionally, if a player becomes an unfortunate victim, "Mob of the Dead's" new feature known as "Purgatory" sends players into the afterlife."
Check out the preview trailer in the video below.