Unrealistic in my opinion. Ali was a transcendent fighter. Speed, power, great set of whiskers. Fury is long, fast, good chin, exceptional eyes and anticipation. But each are a product of their time and demonstrate their skill in correlation to their opponents. Everyone said Liston would destroy Ali, Foreman would destroy Ali- and he won both bouts by TKO and knockout. Everyone said Wilder would knockout Fury, and he won by TKO. I will say both are exceptional fighters with the former being considered the greatest ever. I will say Fury getting off the canvas in the first fight and actually hurting Wilder in the 12th demonstrated to me his greatness for all time. It takes a special fighter to get up and fight like he did. In the second fight he studied Wilder’s technique and exploited him and his propensity to slap. Teddy Atlas said it best when he stated “Wilder’s technique failed him...and his great equalizer was ineffective against Fury”. He relied too much on his power. Also, in the second fight, Fury had transformed his body and looked like a fighter. He won the in betweens-punching when Wilder opened himself up with wild arcing punches and failing to turn his hands over. Fury is a great champion indeed. But like Ali, he is a product of his time. Remember, there have been “David versus Goliath fights” all through history. A 179lb Jack Dempsey beat a 6’6 240lb Jess Willard half to death. So size is important but not dispositive of the outcome. It is too simplistic to declare one of the greatest champions of all time against another who may become one of the greatest. I’m a huge Fury fan. But I had Wilder in that second fight. I don’t know that we can take a snapshot in time and project that out over eternity. Remember, when Tyson was asked if he was unbeatable he said “no, there’s a young fighter right now who will one day end my career, we just haven’t seen him yet.”