Do you think there is any credibility to the prediction that 12/21/2012 will be catastrophic to the earth?

There is mounting legitimate scientific evidence that in the years leading to 2012 the earth may be facing some truely catastrophic events caused by sunspot storms, super volacanic eruptions and the current position of our planet in the solar system. Some of this evidence seems to offer validation to the Mayan prediciton of 12/21/2012 being a time of great change...possibly catastrophic. What do you think? Will 2012 be a time of postive or negative change or will it be business as ususal as has occured during other so called end of the world predictions? Why?