Thinking about Paldea anime, and the school setting with the treasure hunt would give such a good mix of Sun and Moon's slice of life with Journey's mission format. You have the treasure hunt for a few days, where they go on missions, but they they have to return to class and you have slice of life, you get to know other characters, they have silly in school adventures, until the next treasure hunt where they go back on an adventure
Nemona offers Ash the perfect opportunity to "reset". She's also champion level trainer that Ash has never battled, starting over with new pokemon, just like Ash does each series. It’s no longer Ash with his new pokemon agaisnt someone and the team that they’ve been assembling since they first started on their journey, but a competition about how their experience helps them in raising pokemon and training pokemon from scratch.. And he doesn't have to do the gyms, he can help ‘ Cassiopeia ’ in raiding the Team Star bases
A lot of people are like "what else is there for him to do" but like he achieved the champion status at the age of 10, he still has his life ahead of him. "what else is there for me to do, how can I keep giving my life meaning" is an arc of itself. (There's also the fact that he has said that becoming a pokemon master is a lot more than just becoming the #1 trainer)
And if they continue with with Goh and Chloe, the Path of Legends seems perfect for Goh. Very project Mew type of missions. For Chloe, I would love for her to find something she's passionate about. Gyms would have been perfect, as a representation of the 3 stories to do in ScarletViolet, but she’s not into battling. Contests could work (or performances as Paldea is right next to Kalos but i don't like those as much). That being said, i'd like to see her bond with Arven, as kids of professors who are trying to do their own thing.
And ofc, they'd continue with missions from professor Cerise. and I would love to see Proffesor Sada and professor Turo interacting.
