https://www.deviantart.com/k2basior/art/Alola-vs-Galar-anime-919669678So an idea I had some time ago was what if Ash kept his Alola Team for Journeys (since it's his Champion Team).
The Team would get some changes (Lycanroc will stay with Kukui) and he will get his Mega Lucario (which in this version is an offspring of Ash Lycanroc and Kukui's Lucario) and Dracovish and Ash will travel back in time to Hisui at some point and his Rowlett would evolve into Hisuian Decidueye. His Melmetal will learn to Gigantamax. I think it makes more sense than sudden getting the Gengar and Dragonite and Sirfetch'd. Also it would make Ash a better representant of Alola in PWT.
https://www.deviantart.com/k2basior/art/PWT-Master-32-921179850 