Why's it a stupid move? He'd have to beat Lawler, and Thompson to even get back into title contention in the UFC. I don't see him doing that. The UFC would have had every reason to give him a low ball offer. He's 3-3 in his last 6 fights in the UFC. People were hyping him as the next coming of GSP[which he wasn't]. UFC wouldn't have paid him as much as Bellator would have simply because they don't make money off of Rory. They were hoping to, but he has come up short 3 times in the big fights. Twice against Lawler, and again against Thompson. He is going into Bellator on a 2 fight losing streak.
Maybe he will be back in the UFC, but unless he shows the new UFC ownership that he can win big fights, and win convincingly and be the next big Canadian Superstar Zuffa was hoping him to be, I don't see him coming back.