Well, since there is a true Pokemon game coming for the Nintendo Switch, here are some of my hopes for it.
1. Add new different types like Light, Sound, Cosmic, Cyber, Virus, Magic, etc.
2. Bring back the Pokemon Gyms.
3. There hopefully has to have a Dark type Gym Leader since we've didn't get one in the previous generations.
4. Give some Pokemon in the previous generations some Mega Evolutions that didn't have them like Dragonite, Flygon, Haxorus, Hydreigon, Heliolisk, Porygon-Z, etc.
5. It should have a region based on Russia.