Who will likely be heavyweight champions in the next 5 years, assuming Fury, Joshua, and Wilder will all retire before then? If the titles are no longer unified Dubois will probably be a champ, but who else will have a belt, or is it likely there will be an undisputed champ by then?
Very unlikely that your assumption comes true about Fury, Joshua and Wilder but if it does... I think Whyte will get a title. Maybe Parker gets one again and possibly Rivas and Usyk for sure. Dubois will need some more time i think.
Hrgovic. He can’t spar Dubois without knocking him out, Whyte will be done, Usyk Fury Wilder Joshua too
Fury will be around a long time. He has stated that he realizes that boxing is all he has and that he will do it as long as he can. So the answer is Fury. As for the prospects, Dubois based on having a major promoter, hype, and youth. I would think given his power and crowd-pleasing style, Mahkmudov will find his way to a belt. Usyk will be walked into a WBO belt. None of the young guns are that inherently great.
Clenelo will be heavyweight 220lbs by 2023.. He will get to it by eating clen, trenning hard and anavar giving up. I wouldn't surprised if he does and fights the weakest champion in an obvious sparring session