Star Wars is a massive universe made up of movies, TV series, comics, books, video games and more. Since A New Hope hit movies theatres in 1977, an epic story arc has been building for forty-three years. This included a multi-media Expanded Universe that took fans far beyond the movies.
You didn't need to consume it all to enjoy Star Wars but if you did you were treated to a incredibly detailed narrative.
When Disney took over the reigns of the franchise, the entire Expanded Universe was put out to pasture. The only stories left standing were the six feature films that existed at that point and an animated series called The Clone Wars. But that was only the beginning.
Over time, Disney started building their own Expanded Universe. Some stories and characters from the previous Expanded Universe were adapted for the new one, like Grand Admiral Thrawn. But there were also entirely new characters created for the Disney Expanded Universe, some of whom were absolutely incredible.
One of the best is Doctor Aphra, an archaeologist and criminal who is a master of brilliant schemes. There are a lot of characters who would be great subjects for a Disney+ series, animated or live action, but Doctor Aphra should be high up that list.
10. Pre-Existing Stories
After Disney bought out LucasFilm and took over stewardship of the Star Wars Universe, the duties of publishing comics eventually migrated to Marvel. Dark Horse had been LucasFilm's publishing partner for a couple of decades but Marvel was another Disney company. The House of Mouse naturally wanted to keep everything under the same roof.
It was, in a way, a homecoming for Star Wars comics, as Marvel was the original publisher prior to Dark Horse.
The downside was Dark Horse had spent years putting out some incredible Expanded Universe content that was now null and void. It was a bitter pill for long time fans to swallow.
The upside was Marvel delved into some new stories and characters, including Doctor Aphra who appeared in Darth Vader's comic series, before getting her own title. While she has primarily appeared in the comics, there is a lot of backstory to work with to build a new show from. Naturally it doesn't have to mirror the comics, but in terms of source material there certainly isn't a small amount to work with.