>>33867249I'd bet on Gen 1 remakes. We still haven't gotten a full version of Kanto with the physical/special split, and Gen 1 remakes would lure in the purists who don't think they can play Pokemon on anything other than a Game Boy. If they are Gen 1 remakes they might not be remakes but new games that take place in Kanto, and will probably be packed with all kinds of fanservice, not just the usual Gen 1 pandering.
Once they have an idea of how much of a fanbase they've got on the Switch they'll decide what to do next.