The next Pokémon games are a little diffrent than previous games
No new Pokémon
No new Z-Crystals or Mega Evolutions
Think of Super Mario Maker and Drawn to Life but for Pokémon
You can make your own region and story
You can have up to 300 Pokémon in your Pokédex and put them where ever you like
If you put all 300 Pokémon in your region you will be able to trade with other trainers to get more Pokémon available
You can make your own story
You can pick between the Red and Blue template, Gthe FireRed and LeafGreen template, the Black and White template and the Sun and Moon template
Every track (including new composed ones) will be available to put in your own city or town
There will be downloadable content
You can choose between the traditional Pokémon core route or the Pokkén route