Tito was at his optimum physical shape and power when he fought David Reid at 154lbs. That Tito could possibly hurt him. But Tito right now couldn't even hit Mayweather just to much defense on Floyd's part. And 2ndly Tito can't burn down to 154 anymore.
It would be fun to watch, but Tito's got to beat Roy first, and honestly, I think Roy's gonna KO Trinidad. But if he lands that hook just right and does put out a win, I'd love to see him against Floyd. Not a likely scenario though.