I would like your opinion on first Paul and greninja please as what it can do as there are many possibilities as I think Paul will be in a hyper class last opponent or in the masters eight as for greninja what do you think will he serve as a mentor to lucario
Paul as the final Hyper Class opponent would be so dope, better yet I would not mind at all if he was a member of the Master's 8. However given the Ash has already "beaten" him, I personally do not see a reason to repeat that in a way that would benefit the story. I would rather Paul return in a way to offer closure to his character, by showing him being more accepting of his pokémon, giving him a new goal like when Gary decided to become a Researcher. I am not sure what vocation would mostly suit Paul other than battling, but I'm sure that there is something, maybe looking into legendary Pokémon which would tie into the presumably upcoming Regi arc that was teased. Or maybe he can succeed Brandon as the next Frontier Brain.
I want Greninja to permanently return as a member of Ash's team. That doesn't require it to be stashed at Oak's lab once Ash is done with this Journey. Since the Gen 6 starters were not present all throughout the Gen 8 games, I could see them being implemented in Gen 9, which would allow further promotion of these pokémon, and if Ash returns in the next saga or if this next saga is meant to continue what was established in Journeys we could see it as a member of Ash's team.
For the most part, I don't want PM2019 to end, there is just so much to cover in such short time and it's just getting good. And I wouldn't like a return to previous establishments in the next series. Rather, I would like the Gen 8 section of the anime to act as what Kanto was to Johto in the OS.
Contrary to a lot of people, I actually like Goh. What did his character and the series wrong in my opinion was all of the filler content, but that can be fixed! There are so many things left to cover and I really don't want this saga to end, or to see these beloved characters go.