Pokemon with a season pass and a "third version" that's just a collected edition is the best of both worlds I think. But GF hasn't expressed interest in downloadable content, free or otherwise
Unfortunately so. I'm not really into DLC myself, however I also feel 3rd versions like USUM are pointless in this day and age as well, so its sort of conflicting to support anything than a full package from the start. However on the other hand, a season pass style DLC package indeed is a future for Pokemon that has potential. For hypotheses sake, take something like Kalos:
-Instead of the bad pacing and high level league, the games stort peaks at lvl50.
-DLC side stories within a new area of the region come out over 3 years for the event Pokemon.
-Within Year 1 this new Area, South Kalos opens up for a new post league story.
-Year 2 sees the battle Frontier open within this new area for free.
-Year 3 sees a complete release platinum style game, alongside a giant Zygarde Cell Hunt story, including the return of Lysandre and Team Flare.
For Gen 8 they can do something similar:
-Year One post league Ireland.
-Year Two Battle Frontier or PWT
-Year Three 3rd Legendary story and more stuff.
If they really wanna go wild, they could create a new Pro level gym quest in Ireland with level 60+ gyms and a level 80 league.