I would bet a lot on the fact that when floyd retired, he always planned to come back. So when someone retires like Floyd, he is up to no good! Its take your pick why you think he did what he did and you wont neccesarily be wrong, Floyd cant prove otherwise.
He wanted to get the pressure off of himself to fight dangerous fighters. He wanted his peers to beat up on each other so he can get the leftovers like vulchers in the serengeti do.