When Ash saw a Ho-oh for the first time, he wished that he could have a pokemon journey that would last forever, and that's what we got! >=D
Lol I'm kidding x)
I think Ash will go on and adventure the new region, Ash is a hardball and is difficult to get rid of
The main character won't change that's why he travels in a party, so the party can change and he can stay.