Obviously depends on who he defends against. Right now, there aren't many out there who are ready to really challenge him.
Fury only has 2 things stopping him ruling this current heavyweight division 1. His conditioning 2. mastery of controlling smaller fighters
He'll hold it until retirement with Hughie keeping Wilder's trinket warm. Once Tyson retires, Hughie will unify. It's now the era of the Furys.
Basically, I think say Fury has that rematch, he'll obviously beat Wlad the same way again. After that I expect some milkage so the next 2-3 fights should be soft touches. In about his 4th-5th defense he'll either meet Wilder, Joshua or Povetkin who I think will beat him (if Povetkin doesn't decline). If not, either way I expect even one of these mandatories to get a W against him sooner or later (probably sooner), I don't think he can have Wlad's dominance even in this weak era.
You know everytime I see your username I think you're a huge Tyson Fury fan until I actually read your comments.
I actually am a big fan of Tyson and his cousin Hughie. I've just been a fan of Wlad and Vitali since I was a kid.