What do you think will happen in 2012?

The Ancient Mayans and Aztecs predicted several different events as in Lunar and Solar eclipses on the exact dot so this has startled and baffled many people but not all would believe this but one of the predictions was that a comet would come and end it all, a earthquake shatters major landmes, that a cataclysmic event happens and the old what was believed as gods to them but may have been aliens from other planets mistaken for their look of being divine and that they would come back in 2012 to save those who lived thru the cataclysmic event? I'm just curious on what you guys think or believe if this would, wouldn't, or of some degree would happen.