If Jones wins, and i believe he can snap a generous judges decision considering his status, it would be a unique and never done performance.
It's a guaranteed GOAT status. GSP came back after a while and went up a class but only to defeat an old, one eye, washed up Bisping.
This is a complete different game. Especially if you consider HW a particularly difficult division to go up to if it's not your natural weight.
The only example of a successful heavyweight transition i have is Couture getting the UD against Sylvia. That was awesome.
Now if Jones can win with all these obstacles, there's no way we can deny his greatness.