Nah, it's all about watching the world go to shit (and it does quite epically and nearly everyone on Earth dies, but the ending was most bullshit), and no detailed elaboration is made on the whole Mayan predicted it thing. Only one simple comment in the entire film mentioned the Mayans from what I saw, and that person basically said that despite our technology it seems the Mayans knew this was going to happen ages ago; nothing else except for maybe a brief news report showing a suicide at a Mayan temple and the newsreader saying how the sun was acting a bit weird too.
The truth is, the film could have stood alone without even needing to refer to 2012 at all, and just be a junk disaster porn flick. But since 2012 arouses so much superstition, it was exploitation at it's finest to sell the movie.