I been hearing about this Planet Nibiru suppostly heading our Earth in yr 2012?

Wanted to hear all of you opinion on this subject. This planet will p our orbit in yr 2012 but in 09 its brightness will be visible from naked eye. It suppostly got part of our solar system after all planets were been formed, and planet nibiru suppostly crash with some other planet (can't remember named) and thats how our asteroid belt was formed. Also, this planet Nibiru orbits our solar system every 3,600 yrs. Some claim is responsible for great flood of Noahs Ark etc...Just give me you're opinion on this topic.