I think Wlad is doubting himself, hence the new date. I also remember what happened the last time Wlad doubted himself. He is going to come in the best shape possible for his age and demolish Fury in a WAR.
He has a very realistic chance given his intelligence, extreme discipline and dedication to training, and his physical attributes/strength I pick Wlad to win the rematch
At 27 I would never have bragged about winning a decision over a 40 year old. If they fight again, Wlad has to fight his age, he tried to fight like a 30 year old and that was terrible. He needs to fight like he did before he became a safety first fighter, if he can do that he will win by KO very easily in the rematch.