hate to spoil ur comment but only the Treyarch games will include Zombies as that is there trademark, only Activision works both with Treyarch and Infinity Ward (MW series). MW however is trying to introduce their own version of 'zombies' where it's a crossbreed between zombies and their Spec-Ops game mode in MW2.
I definitely agree though that it should not be the last map and could actually be leading into a more modern call of duty zombies (after black ops) Due to it refers to a style of 'Moon Base', a concept that NASA and NATO are putting efforts or at least were to start construction in 2012 :P
