Here's an esoteric theory that is interesting and not too far out on the fringe, this one may worth the time to investigate. This person does not explain the out come to avoid bias, he only hints that the coincidence is far too weird to over-look. He only gives you hints of where to look eg, Giza pyramids, 2012, Numerology, Procession of the Equinox, Bible, Masons, Myans, planetary alignment etc... Check this one out and if anybody has any comments please provide them because conducting an unbiased search to validate his claims could take months if not years.
To me this one seems to be the most plausible of the 2012 stuff and it is very interesting. I will continue to investigate and if I find anything I'll post.