While all the rumours say he's left. He still hasnt confirmed. If I've learned anything from mma its that you cant believe what you hear. IF AA has indeed OFICIALLY parted ways with UFC he'll get offered the good fights waiting for him. He'll be welcomed back if when he wants to.
On an unrelated note. FIG this is for you.
http://www.youtube.com/watch?v=X5dE70_e ... re=related
it contains a quick moment about AA's prediction on the Sylvia/Fedor fight.