There is no denying that the Mayans were intelligent and advanced. But look where that got them.
The 'end of the world as we know it' has been occurring and observed by human kind since first cognitive thought. It's nothing new. The 'world as you know it' ends every second as something is always changing that irreversibly alters our existence. The only difference being the scale of the event which changes our existence. Small and subtle changes may not be as apparent as large cataclysmic ones, but a change has occurred nevertheless. Ergo, the 'world as we know it' has ended.
The universe/multi-verse is a volatile place in a constant state of flux. The human species will cease to exist one way or the other at any given time. That much is fact. So too is that our existence will barely register in the 'great time line of the finite/infinite'.
Selecting and focusing on an arbitrary date or event which could theoretically occur, only leads to unnecessary anxiety and obsessive fixation, which is actually more detrimental than simply accepting the things that you cannot change.
If 2012 was to occur, rest assured I wouldn't be happy about it, but I'd be less happy trying to eke out an existence in a post 'civilized' wasteland.
In other words, I wouldn't worry about it.
Why would you want to be a King of nothing? Stop watching movies