It's very hypothetical, and not so likely at all to happen.
But say in a few years, in a few more generations, too many Pokémon exist to continue programming in for every entry of the series.
So 200 new Pokémon are added. However no old Pokémon are returning. Aside from some who would be released in occasional events due to popular demand.
How would you feel about a new game in the series that does this? A bit similar to the original Black/White, except older Pokemon won't be in the post game.
Pokemon would not be available to trade over. It would be like a reboot in the series.
But say in a few years, in a few more generations, too many Pokémon exist to continue programming in for every entry of the series.
So 200 new Pokémon are added. However no old Pokémon are returning. Aside from some who would be released in occasional events due to popular demand.
How would you feel about a new game in the series that does this? A bit similar to the original Black/White, except older Pokemon won't be in the post game.
Pokemon would not be available to trade over. It would be like a reboot in the series.