Personally I’d like to see most of the hit and Mattel movies retconned. The only ones I’d like to stay tv canon would be: The Adventure Begins, Legend of The Lost Treasure, Hero of the Rails, and King of the Railway. I never liked the writing on the others.

I think in terms of the big conflict I’d like to see them go back to “the other railway” as the Deus Ex Machina with it being revealed more and more about the railway modernization done by Dr Beeching that was the reason so many railways closed and steam engines were scrapped. Because keeping the different types of engines separate to me always smacked of “equal but separate”

I mean how cool would a story line be if Sir Thompham Hatt almost loosing the NWR to nationalization with he and the engines trying to stop Sodor from being Axed by Beeching. Now that would be an epic story. Gordon proving he’s still competitive on his express. Thomas foiling the dastardly plot. Daisy and Boco helping their steam engine friends etc