A leaked (and unofficial) video posted on YouTube today seems to suggest that Richard Nixon, John F. Kennedy, Fidel Castro and Robert McNamara will soon be teaming up to stop the walking dead invade the Pentagon in Call of Duty: Black Ops' Zombies mode.

The video posted by "Mr1stinLine (Which contains massive campaign spoilers - be warned) shows the game's final cutscene, end credits and then direct footage of Treyarch's ever-controversial (but much loved) addition to the series, with the player assuming the role of JFK himself - skip to 4:20 to avoid the spoilers.

The leaked gameplay footage shows JFK opening his personal secret cache of weaponry at the onset of the zombie invasion, as well as shouting things like "I want it!" when looking at weaponry hanging from walls.

Treyarch originally added the 'Nazi Zombies' mode as a post-game bonus to 2008's Call of Duty: World at War. It became successful enough to warrant extra maps being included in DLC packages, as well as a return in Black Ops.

Call of Duty: Black Ops is released November 9 on 360, PS3 and PC.