Game Freak excited to see the main way people play Switch, will try to make a Pokemon game that meets expectations

[VAMatt]

mZuzek said:
Sounds like something we won't be getting until late 2019 at earliest.

From the sound of this interview, I'd say 2020 or later is more likely.  If they are truly wondering how the system will be used, and feel that is of central importance to the development process, then they must be in early brainstorming stages.