Or there is another way. Continuing Ash in the old formula and he do the gyms or maybe he is allowed straight into the champion rank. Just because user on this forum limit themselves doesn't mean the writers do
And listen. I'm all for a new MC. I just don't like how people here are talking like it's an absolute fact that the old formula is gone forever. Like it's all speculation
Yes but you have to admit that them just completely reverting back to the old formula is not a likely outcome here.
As don’t forget they could have easily reverted back to the old formula in gen 8 but they chose not to.
Heck if you look at it each successive Pokémon series has made more and more changes so in all likelihood a successor series to the current series is likely going to make even more changes.
I mean heck notice how BW(Gen 5) was the last time Ash had a Water, Grass, Fire type, and regional bird all on the same team.
X&Y: Ash didn’t catch a Grass type and instead of having a traditional Fire type his regional bird served double duty as his Fire type and regional bird.
Sun&Moon: Ash didn’t catch the regional bird nor did he catch a Water type, on top of that he officially caught a mythical Pokémon and a Ultra Beast, and even had a legendary mascot Pokémon being his Solegaleo nicknamed Nebby that he raised as a Cosmog.
Journeys: Didn’t catch a current gen starters nor did he catch a regional bird, Fire type, or even a Grass type, and wound up catching some past gen Pokémon and even got a fossil Pokémon and Mega Evolved one of his Pokémon.
Obviously there were other changes. So while it’s not impossible that they could go back to the old formula it is pretty unlikely that they would revert back to the old formula.