Will there be catastrophes, major cataclysms, or major transformations in the Earth’s geology in 2012 due to global warming, solar storms, or other phenomenon?

If this prediction is so well known, why dont we hear more about it now that 2012 is approaching fast?
For those who don’t know what the prediction is, the Mayans predicted the Earth as we know it will come to an end on Dec 23. 2012.
They say that the solar system, a black hole, and the earths equator will line up and cause a shift in the poles of the earth.
What do you think about all of this? And more, what do scientists think about this?

I recently heard from my uncle (who is an earth scientist/ university proffesor) that there was a gathering of 300 or so scientists who have been monitoring the suns activity and have noticed that sunspots are increasing and that the sun is slowing down its rotation.The suns rotation is apparently what cools it , and when it eventually stops turning (predicted as sometime in 2012) it will continue heating up in its core until it eventually explodes.As such the earth will be plunged to -40 (celcius) temperatures and of course into darkness.
And on a slightly off topic note; isn’t it coincidental that so many religions , civilizations and prophets have predicted the earth ending in 2012? So; what are your guys thoughts?