hey guys I was just having a look on the Call of Duty website and found this
Old school Zombie strategies get blown out of the airlock in "Moon," where armed with new perks and a space-age arsenal of weapons, our heroes must overcome undead astronauts and fluctuating gravity as they unearth conspiracies that began in 1943.
I dont know if this has been posted (dont flame if it has) but it could be telling us 2 things:
1-1943 was when the zombies were actually created at Der Riese
2-1943 was when the Nazis set up a moon base
thoughts
EDIT:http://www.callofduty.com/blackops/dlc4/moon-screenshots?path=blackops/dlc4/moon-screenshots
Its underneath the screenshots