PKG will be going under a new name which will revealed later!
All Cities and NPCs will be removed
There Will be one singular PokeCenter and PokeMart
All Eight Gyms will accessible
All the routes and other places where Pokemon usually spawn will be removed and redirected
Pokemon will spawn based on the Terrains you are in
So far the idea is to have 12 different Terrains to catch all 151 Kanto generation Pokemon
You want to be further updated consider following the YOUTUBE Channel!