It might not only be about Kamaru Usman being the Nigerian Nightmare, pound for pound best or the money that he was having for dominating the division. I think that it might also be more about how he was knocked out! In any case, I speculate the odds of the rematch might be similar to the first fight. Leon Edwards will be underestimated again and Leon Edwards will prove everyone that we are wrong again hehe.
I think you meant third fight. Usman and Edwards already met twice
If they meet again, I believe Usman will be more oriented on his wrestling skills. I just dont think that Edwards first defense will be against Usman. Who know, maybe Chimaev will be the one to take Edwards belt. Maybe Chimaev and Usman gonna meet first, and only then Edwards is going to have a title defense. Imho, Edwards is quite boring when speaking about selling the fight. Usman was much more popular. For a business, I think UFC will try Edwards title defense as quick as possible, to test his selling skills or to change current champion.