That's probably the biggest fight that Wilder can get after his career, he is 35 years old. He will look for the puncher's chance, and we all know Wilder is the best puncher when it comes to that. If he can get lucky, he can win. But it's still a low possibility.
The problem is their contract, whoever loses of the second fight, can force the other to the third match, so the third fight was inevitable, and possibly Wilder will retire afterwards.