2 things, first, to answer your question, not until they recalculate the numbers that gave them the date of 2012, (this is assuming they were wrong, they might be saying "See, we TOLD you so" )
Second, what is predicted is NOT "The End of the world". What is predicted is " The end of the world AS WE KNOW IT".
Those 4 words make a big difference. They make no negative reference, there is nothing in the phrase referring to destruction, only CHANGE.
It COULD mean total devastation, but it could just as easily mean unimaginable IMPROVEMENT.