That’s an interesting idea. Like I said last time, though, I think you have to define your goals a little more clearly here if this is an actual project you want to kick off. Where would you want potential viewers to stop watching the official series and start watching this fan-made final season? Again, for me, I would keep seasons 1-8 as they are and then build a final season on the bones of season 9.
But another good place to start is, what’s your series finale? Who Shot Mr. Burns is a pretty solid candidate for that, actually. Considering it’s a two parter. But would you be worried about killing off a character or doing something drastic considering The Simpsons Movie? I think it’s pretty good (better than the show had been for a few years prior to its release) and I wouldn’t want to mess with that.
I’ve actually edited The Simpsons Movie, I turned it into a 60-minute special, it’s listed on Fanedit.org
https://ifdb.fanedit.org/simpsons-finest-hour-the/
If so inclined, this could be a potential candidate for our ‘finale’ as it fits a tidy extended TV format.
For me personally, The Simpsons ended with “Homer’s Enemy”, where Homer’s role in the Springfield community is truly defined in itself. He’s largely found acceptance amongst them they find joy in his bungling, entertainment in his idiocy. When Homer says “Change the Channel Marge” in his sleep, that’s basically a command to the audience to just stop watching the show, it’s peaked. This is where I would advise people to stop following the official seasons and from there enjoy the fan-made ‘final’ season
I was also thinking we could somehow edit The Simpsons Arcade Game into a workable “gimmick” episode, or a short for the ‘final’ Treehouse of Horror.