Same person behind it as
http://www.fractionalvillas.com so it doesn't look to me like a promo for a movie or a video game.
The stuff about the Mayan Prophecy makes it sound like a bit of preying on the feeble-minded in the same way cults do.
As for hiding in an underground shelter I'm not sure I'd want to survive a nuclear war and come out a year later to utter devastation anyway.