Rakata
They sound scarier than the Yuuzhang Vong
Imperialist slugs
I'm not much of a Star Wars guy even though I've seen all the live action movies other than Solo. So maybe my ideas are addressed in a TV show or an animated movie or something
I want to see an origin story for how they moved into space like they have.
Origin story for the force
Origin story for the Sith
And this. Though not what he had proposed. I don't want it to be some sort of redemption story. shyt got to be like Breaking Bad in that regard, he goes bad and stays bad thru to the end.
I'm going to assume that KOTOR's "prehistory" has been wiped out of canon. In that version, all humans in the galaxy were descended from the ancestors of the Sand People/Tuscan Raiders who were enslaved by the Rakata.
So, what I would like to see would be a story set in the pre-spacefaring DISTANT past of the Star Wars universe. So it would be like a "Lord of the Rings"/"Dark Crystal" story, more weird fantasy than Space Opera. I'm thinking of things like the ancestors of the Jedi order, going on quests with metal swords (because they don't have the electronics yet to create lightsabers) but fighting with Force powers and martial arts. Make it feel like an 80's dark "sword and sorcery" movie.
But I don't think they're creative enough to pull that off, so my less creative idea is "Hutt Clan: Godfather"
My 3rd, even less creative idea is a new canon replacement for DROIDS:
I could actually see Disney doing that, lots of marketing potential, not a lot of effort required.