Although Mayweather won win absolute judgement but Pacquiao still curious about the match because he experience shoulder injury on last 2015
I don't think it will make any difference at all. Manny has shoulder injury, but it doesn't chance the fact that Mayweather is a defensive genius and even if Manny's shoulder is healthy, his already past his prime at 2015 so the outcome will just be the same.
I agree though we still don't know what may happen. The chance of Manny Pacquiao winning is not zero but the possibility based on the past fight is favoring Floyd Mayweather.
I think Manny Pacquiao wants to prove that he can defeat Floyd since we've seen a lot of rematches from the rivalries of Manny Pacquiao in his prime. Also, we can't say that he is past his prime since he can still fight like he does, and Floyd is also the same since their age are close to each other.
With unbreakable 50 won record, mayweather still dare to take the challenge but I can see that he will keep his record for 51st , ofcourse with some effort because PacMan won't let it happen so easy !
His taking the challenge because he knows that its easy money for him. Unless Manny can hit him with this powerful left, but I think Floyd can easily saw it from afar because Pacquiao is a bit slower now. Yes, 51-0 when he retires.
He might not look like it but I think Floyd is just finding someone that can break his streaks. I mean it is great to be undefeated on the long run but you might realize it is a bit boring not knowing no one can give you a loss.
I know that is just an anime or drama twist but it may be, probably. For now, let's see what will happen in the updates, I've read this article about Floyd being "serious" with the fight. You can just read the article
HERE