What is the next Zombies map in Black Ops 2 going to be?

Call of the Dead from the Escalation Map Pack on 3 May 2011 for the Xbox 360 and June 2011 for the PS3 and PC. Treyarch and Activision have never said a Word about releasing a DLC with the World at War zombie Maps. I know some people would like them released but that does not going to. There is also no information the Map Packs First Strike and Escalation will be released for the Nintendo Wii.