Quoted By:
Current theory:
Ash becomes champion of the Alola League, completely murders Gladion and Kukui, and now takes a break to travel back to other regions and meet old friends and have wacky adventures with them. Meanwhile, Gloria starts her journey in the Galar region. Since the Galar League is run by corrupt folks, Champion Ash gets dragged into it and that's how the story of Sword & Shield gets adapted.
It's still Ash's story but it's also Gloria's story. Ash isn't taking on the Galar League though. He's taking on the corruption in the league. Gloria is taking on the actual league itself. Of course Gloria is just a placeholder for whoever they want to be the Galar MC, I hope it's Gloria cause she's cute but whatever they want man.