The upcoming Imperial Zombies map is a zombie map found in the game files for Call of Duty: Black Ops. This map is intended for being in a map pack for World at War, but was put in Black Ops's game files for unknown reasons. This map contains elements from the WaW multiplayer maps Castle, Downfall, Roundhouse, Sub Pens, and Battery. The four original characters would return: Dempsey, Nikolai, Takeo, and Richtofen.
Supposedly, this is to be the largest Zombies map yet. This map takes place in a bombed-out Japanese castle, with a court in the front of it, identical to the one in Roundhouse. Tons of destroyed tanks litter the landscape, which return from Downfall. It includes a sub base in the back-right of the castle, with a near destroyed submarine in it, from Sub Base. Several cannons layer the outside perimeter of the base, which are from Battery. Also, elements of the sub base are from Battery too.
It is rumored that you can also ride the submarine, but this is unconfirmed.