Fury beating AJ, Usyk, Joyce and so depends not only on him. Still, there's a dose of overrating Joyce, not that a fight between him and Fury will not be exciting to watch. It seems he won't come back to his old style, but he always keeps it as a plan B and can execute it just good enough. Has like 2-3 years left if he decides to go against some top names and then he can and should retire around the age of 37. Of course, can go until 40, but will probably loose the undefeated status. How Fury will do in life - we'll see. He inspired a lot of people battling his drugs and alcohol problems, he can continue doing it and should stay away from them, that's for sure. I don't believe he'll become extremely fat once he stops boxing, but maybe will gain some weight which at his current state isn't good because he never made it back to the good physique he had before sinking into those problems. He can be amusing, maybe he'll have some success as an actor, commentator or I don't know.