Its a tough choice, MMA comeback doesnt seem easy in Renan Ferreira, how's the expected pay for that one? I would say its a very slightly less risky fight than going for a 3rd boxing fight, considering he will most likely only fight at the top of the food chain, who is he realistically going to box? And for how much money?
Whoever pay he most i think should be the option, retire win or lose, if he takes the MMA route it will still be over a year for him to fight again, that if he wins.
PS: For PFL to match boxing money they will lose money on Francis, they might not be so eager to make it happen after last night.