Black Ops II adding 'Uprising' DLC April 16?

Call of Duty: Black Ops II will add its second downloadable content expansion, called Uprising, on April 16. That's according to supposed Best Buy marketing material posted by a Twitter user today (via Joystiq).

According to the material, Uprising will add four new maps (Vertigo, Encore, Magma, Studio) and what appears to be a new Zombie-themed offering called "Mob of the Dead."

If true, this would follow the formula set out by Black Ops II's Revolution DLC, which featured four multiplayer maps and one Zombies mode. All Call of Duty DLC comes to Xbox 360 first, with subsequent launches for other platforms about a month later.

An Activision representative was not immediately available to comment.

For more on Black Ops II, check out GameSpot's review.