Chandler will likely never fight in the UFC. He's Bellator's boy and it seems he'll be with them for the foreseeable future. If he ever changes his mind and wants to be in the UFC in the future, it'll be too late. He already has looked like he's declined after the second fight with Eddie. The way Brooks finished him was horrific, too. I doubt he'll ever be the same.
He looked ok when he beat the Caveman but let's be real, that was a complete gimme for him and it was nowhere near as easy as it was the first time they fought. That seemed more due to Chandler not being the same, physically, moreso than Rickels improving.