There is no need for a third fight in most fans opinion

This^^^

 

Rematch would just be a repeat of what just happened. He can't out box Fury and now he can't out fight him, chances are he just gets KO'ed quicker the 3rd time.

Only reason it happens is because it's the biggest money fight left for Wilder after losing his belts and his handlers decide to get one last payday out of him, knowing full well he'll get his ass beat again.

I don't see Joshua/Wilder happening, Wilder without a belt means Joshua can't skip mandatories for him and Wilder now only gets a fraction of what he would have now there's no chance of an undisputed champion being crowned. I can't see Wilder's ego accepting 20% or a flat fee.