Well we know the poles flip every so often on earth, and we are overdue, so couldn't this happen in 2012? It could be a large object in a Haley's comet like elliptical orbit does a close pass to earth in 2012 and their poles repel each other causing earth to get a new earth pole and cause dramatic geological damage. The book Worlds in Collision by Immanuel Velikovsky makes a convincing case base on historical records that something is coming up...
Except the poles don't flip instantaneously, and the process really wouldn't cause that much trouble in any case.