While I'm all for GF making some original IPs every so often (they previously also made games like Drill Dozer, Tembo the Badass Elephant, and HarmoKnight), I dunno if GF really is the sort of company I can see making a "AAA action-adventure" that's likely going to be similar to something like Ghost of Tsushima or Zelda. Pokemon is the largest IP they work on and their rocky transition into "HD" game development has been extremely rocky, probably not helped by The Pokemon Company's strict deadlines and what appears to be a refusal or inability to seek outside help from some of Nintendo's actual first party studios like Monolith Soft (again I'll remind people: Nintendo does NOT own Game Freak, they're still a third party studio).
Still hey I wish 'em luck, they're gonna need it.