Manny vs Leonard at WW seems more fitting. Because I remember a few years back (probably around the time he thrashed Cotto) some people saying that Manny would give Leonard hell. Granted, Manny has faded since the Cotto fight, but wouldnt really matter. Leonard would have stopped him in a one sided fight.
I made a much more recent thread on this as a joke and there were people saying Manny would give Leonard a tough time.
I think anyone who thinks Manny or Floyd would do anything but lose convincingly to Leonard is potentially a dangerously unstable person
Lol. Leonard KO's Marquez early. Pacquiao would make a fun fight with Leonard but he would meet his demise by the middle rounds with Leonard's left hook. Mayweather would fare better but only because he would be able to make Ray miss and counter him like Benitez did. But Floyd doesn't have the power to hurt Leonard and Ray would just wear him down late. Leonard via UD or late stoppage.