"Yes, there will be a new wave of undead coming soon and--while we appreciate everyone's concern (and we don't condone vandalism)--we assure you that these zombies will only be found in the Call of Duty: World at War Map Pack," said a Treyarch community manager on the game's official forums, referring to various 'Zombies Ahead' road sign pranks.

No release date or pricing info has been revealed for the upcoming pack.