2012; Does it really signify the end?

It has been established that the Mayan Calendar ends on December 21, 2012. the Dresden Codex, the most complete of four known Mayan Codeces suggests that on this date, the world will end in massive flooding. A History Channel special on the Mayan Calendar compares recent history with the Katun cycles associated with different parts of the Mayan Calendar. It also mentions the alignment of the sun with the center of the galaxy and the completion of one cycle of the Earth's axial wobble. The show does not take a specific view on whether or not the world will end on December 21, but the evidence presented throughout the show encourages the reader to believe that 2012 will be either a time of great change or the end of the world itself.
Video (this is only one of several in the series)
There are several problems with this video. First of all, it uses the same concept as the 23 enigma. All of the predictions are fairly vague and make it easy to find historical events which could correspond. For example: Katun 3 prophesizes homelessness, calamities, and war. However, all of these issues have existed constantly throughout history, so it is only a matter of finding a specific event during the particular time period that corresponds to the date of the Katun. Also, the video fails to explain how either solar alignment or axial wobble could possibly affect the earth on that day. For these reasons, I think it is safe to assume that this particular source does not fall within the realms of "good science."