Black Ops 2′s first DLC pack is called ‘Revolution’. Take a look at the teaser image.
The DLC includes four new multiplayer maps, one is set in a skate park, a new Zombies map (Hydro, Downhill, Grind, Mirage, and Die Rise) and the Peacekeeper SMG weapon. There's no release date or price yet. It's rumored to release on January 29th on Xbox LIVE first.