Kanto is love. Kanto is life.
I am just thinking about potential the biggest problem of PWC: If Ash gets to Top 8, we will very likely see 1 on 1 battles like Raihan vs Leon and Lance vs Leon and we all know what Pokemon Ash will use. And thing is if that Pokemon beats Leon's Charizard( or other E4/Champion level Pokemon before), he will likely reset in Gen 9 like every region he does( or stay inconsistent), making it all go down the drain. Sure Ash will still have title: the strongest , but he also would need to start "all over" since he's gonna catch new Pokemon and they would be weak and certain yellow Pokemon would likely reset , but he would regain Champion level title in the end of Gen 9.I doubt that. They've learned before BW even ended that soft rebooting Ash is the worst thing they could do. That's why they tried to throw fanservice to our face with Dawn, Cynthia and Charizard to try and save the rest of that series.
But I do agree that they could easily make Gen 9 be a tougher challenge and include a League again if they want.