He would need to accomplish what Roy Jones Jr. Didn’t. Beat Makawa At Cruiserweight then come backdown & beat either Bivol , Beterbiev or Benavidez. that would make his legacy greater then RJJ ino.
Get some EPO and some HGH go to heavy pick up a trinket go back down to LH clean out the division without getting KTFO.
KO Logan Paul in a exhibition bout where he is legally obligated not to knock him out then have the legal dispute broadcast on Showtime PPV with Tyson Fury as the judge
I don't think that there is anything in reach. Having a quality heavyweight title reign would be about it, but I think Usyk wins every round on a way to stoppage, and Fury literally kills him, so...
The difficult part about questions comparing a retired fighter to an active fighter is how much emphasis do you want to put on the last part of a retired fighter's career. If you want to look at RJJ through his first loss to Tarver and his next fight loss to Glen Johnson then Canelo can probably never top him. That Roy Jones may be one of the top five fighters ever. Even if you ignored Alvarez' steroid situation it is unlikely he could ever get to that level. Jones should have retired after the Johnson fight. Losing to Johnson was proof that the first Tarver loss wasn't a fluke. Jones never won another big fight and suffered seven more losses over the next fourteen years. For most fight fans, including me, I don't think of the "went on too long" part of a fighter's career as hurting their legacy or their place in history, Although, if you want to think of the totality of a fighter's body of work when judging them I would not argue that concept. For me, Alvarez cannot surpass Jones based on prime. If you are going to use the whole career then we will have to wait until Alvarez is done.
Become a Russian citizen. That would close this issue. Oh, and cherry pick the weakest HW "champ" (and that would be Trevor Bryan) and defeat him.
Get a time machine so that he could stop himself from figthing Floyd. Go a back in time and beat Golovkin and Lara decisively. Jones in his prime beat people decisively, Canelo hasn't.
