It won't be the end of the world, but an end of a certain time period, not ruling out our inevitable deaths, but there are many events that are possible. One of the most popular theories is the polar shift (The North Pole aligns to the equator?) and our Sun aligning to the center of the Milky Way. I've heard about an asteroid, but I'm not sure about that one, but our planet could be affected by solar flares from our sun.

There is the possibility that we will be guided through this "Apocalypse" (Greek word meaning: Unveiling). Whatever is to be revealed, I hope we are ready for it.