Pac will lose a fight likely to jmm and then arum will truely try to make the fight with floyd for the first time. At that point its not going to be a hot fight and they will make a faction of what they could. Or Floyd loses to cotto and team pac will jump all over the fight being that they have a history of wanting guys coming off loses. If both guys keep winning the fight will never happen.
Mayweather has plenty of options for his next fight. Martinez at 154, Canelo at 154, Khan at 147 (it gives Khan enough time to get back on track with a win in the meantime), Ortiz 2 at 147 And Pacs next fight after this will probably be JMM4, and I wouldnt put it past arum to start pushing for Pac vs Rios at 140 or close to. Both these guys will have options and they will never fight eachother :good