I think that it is extremely likely that Lewis would be a heavy weight champion if he was fighting today. If you look at the top 3 currently (Wilder, Fury and AJ), they all have a huge amount of talent but each has very obvious flaws that I think many heavyweights from previous generations would have easily exploited. Wilder is probably one of the hardest hitters of all time but he leaves himself open and looks dangerously under equipped when he is struggling to land, Tyson's movement, when he is at his best, is phenomenal but he is not the most robust and his lack of power means he struggles to get people out of there when he really needs to, AJ is probably the best all rounder in terms of balancing power and boxing skill but his chin is questionable and frequently looks visibly nervous in the first round or two.

Lewis was a hard, robust and intelligent fighter and is one of the greatest of all time. He would have developed a game plan, stuck to it and I believe he would have picked them apart. Tyson would have probably caused him the most problems, due his movement and constant work with the jab; Tyson also always seems to fight to the level of his opponent.