if the money is right, around $300 million figures guaranteed pay for him, we will quickly go to the gym and start training.
That's too big, it's x2 of what he was guaranteed in the last fight based on the figures posted here
https://twitter.com/darrenrovell/status/594709826996834305/photo/1I don't think that would again happen, unless the promoters sees this rematch a better one that could attract more crowd, but then again, the risk is on the promoter, and that's a big money to risk knowing the first fight wasn't an explosive fight.
I think that's the only way to lure Floyd Mayweather out of retirement and fight again. There is no way that he will fight with the same amount of money as the first fight. Manny Pacquiao had done his share of the promotion by winning against Thurman. So the ball is really on Floyd side right now.