That is a cool pattern! I also agree that it won't end at Gen 10, that's very unlikely. But they will definitely do something special to commemorate their anniversary Gen, I would presume!
Good point... I think this won't be the last time they outsource main game remakes to a 3rd party developer. My expectation is that it's going to be like you suggested: a ILCA remake and a Gamefreak Legends game.
Tbh I hope he doesn’t end up winning plot armour style, cause that would ruin the continuity of things imo, but I would have liked to see him more on par with Leon