Here's A Call of Duty: Advanced Warfare "HAVOC DLC" Feature

 

IGN showed off the new X-box first DLC for Sledgehammer and Activision's Call of Duty: Advanced Warfare which went into detail on the 4 new maps, new weapons, and "Exo Zombies" story mode, which introduced a diverse and talented cast of character acttors to voice ATLAS Employees caught in the midst of an undead crisis:

Exo Zombies features a celebrity voice cast and tells the story of four Atlas employees fighting a horde of zombies brought about by a DNA bioweapon. John Malkovich, Bill Paxton, Rose McGowan, and Jon Bernthal lend their voices and likeness to the cooperative story mode.

This is shaping up to easily be one of the best DLC packs to come out of Call of Duty in a long, long while.
X-box One players will get to experience:

Core, the first of the DLC maps, takes place in the ruins of a nuclear fusion plant in the Gobi desert. The second map, Urban, is a close-quarters map set in Dallas Ward 3, while the third map, Sideshow, is set in a creepy abandoned inn in Devil's Tower, Wyoming. The fourth and final map, Drift, takes place in a ski resort and features an avalanche timed event.

On January 27.