The man himself has the news on his blog:
Now, I wanted to let my fans know that I'm going to come back to the UFC & finish my contract. Not because the haters are talking shit about me being scared of Rashad or Titties or anybody else. I'm coming back for my fans & to shut Rashad's mouth up & shut Dana's mouth up. Then after that I'm going back to doing movies & I might do a boxing match once a year just to stay in shape. Hate on dis!