Re: What if Greb fought for the HW title?
One of two things happens. Either:
A. Dempsey catches up with him and knocks him sensless, then modern fans berate Dempsey for fighting a middleweight. Grebs p4p status is still secure.
B. Dempsey gets outpointed, at considerable detriment to his own reputation, and Greb is the consensus p4p #1.