So, hello folks, this is why I think the last map is on the moon:
When I first saw the map, I knew it's gonna be in the future. It has to be. During the space race or even WW2, there wasn't a moon base, was there?
So OK, let's say its playing in the future. Why are there all those huge dig machines (lol, no homo)? Probaly because there is a crapload of 115 there.
But now: Why must we go to the moon? Why not on earth, there is much 115 also? I think, my zombie slaying mates, THAT THERE ISN'T ANY 115 LEFT. I think the zombies are slayed on earth. There is no zombie on earth anymore, so that's why they go to the moon, to fight the last zombie horde. And with this map, it all ends. And I don't want it to end.
That's my theory why there heading to the moon.
PS: It can be on the moon, because it's just epic, though.
(if my english is bad, sorry i'm dutch )
Can I Haz some brainz pl0x? [brains]