I would agree, if it wasn't the ace of Chairman Rose, and Ash has never before owned the ace Pokemon of a primary antagonist.I think Ash getting base stages for 2 stage lines (So base stage and evolution) is more likely then him getting base stages for 3 stage lines, since then they need to develop those mons heavily and the Journeys writers seem to be allergic to give development to Ash's mons (Or mons in general). So i think prime candidate for a Galar capture is Cufant.
tbh, with two Fighting-types in his party already, I wasn't keen on him getting a third one to begin with.I mean, if we base aces of which Pokemon Ash can get or not, he won't get Urshifu either.
I think they’re well aware that we expect development no matter what evolutionary stage they’re at.I think we all now know why they gave Ash a fully evolved Dragonite and Gengar; if they gave him Dratini and Gastly we’d have expected development - it took us about 25 episodes before we realised “hold on a minute, they barely appear and rarely do anything”
I think Sirfetch’d and even Lucario have been resigned to this fate...
I also believe they were aware at the time, but I do think it's because, if they were just Gastly and Dratini when caught, development would need to be more ''obvious'' and would need to be bigger, and also cover multiple episodes, since in the anime world, Pokemon, at least like, 99% of the time, evolve physically to demonstrate their mental/emotional development.I think they’re well aware that we expect development no matter what evolutionary stage they’re at.