I don’t really get why Mayweather is suddenly being brought up. Yeah, he beat Pacman, but he’s been retired and there’s no sign he’s coming back.
Sadly, it is inevitable to happen. A lot of people have still not moved on from that fight and want to see a rematch. Speaking of Pacquiao vs. Mayweather, I saw several articles where Pacquiao called out Mayweather and asked him to fight again just after his fight against Barrios.
If Tyson can fight deep into his 50s (admittedly, he shouldn't have -- or at least fought against a more age-appropriate contender), then yeah for sure a Pacquiao/Mayweather fight could still happen. Apparently Mayweather could get up to $250M for the fight and Pacquiao could get $120M, per an
ESPN story about their last PayPerView numbers. Mayweather did fight last year in an exhibition match, so its not like he's totally out of the sport. A rematch would draw massive numbers.