According to Call of Duty Wiki, MrDalekJD (206k subscribers), and a forum post on CallofDuty HQ, CallofDuty.com received an update earlier today which revealed the name of DLC Map Pack 2 along with some other details uncovered through a new Xbox Live theme coming out with the DLC.
The new DLC is going to be called “Uprising,” and according to a theme description, two of the MP map names are: Studio and Vertigo. The Zombies map is going to be called “Mob of the Dead.”
The theme description in the official site source code says:
“Download the epic Call of Duty: Black Ops II Uprising Theme, featuring Studio, Vertigo and the Mob of the Dead, Treyarch’s most terrifying Zombies experience to date.”
Here’s another image (via @moriarty1975 ) of the CallofDuty.com source code revealing a to be posted image of Uprising:
An official announcement from Activision is expected very soon.