One thing I’d love to see is more emphasis on Anakin / Vader. I haven’t thought all this through but what if the main villains find a way to resurrect Darth Vader? But this is purely his “evil” form. In the process the force ripples and creates a reborn lightside Anakin (by Hayden Christensen) who acts like Gandalf the White. The two forces of the Chosen One literally collide, and in the end, his soul is at rest and the force balanced.
How would these personalities of Anakin manifest themselves? How would they appear to us?
I’m hesitant of this idea, because it ultimately ends up creating an “evil-twin” confrontation, like a cheap 80s TV show. I’d like to think Star Wars is above that.
We do know that there are no souls in Star Wars. Anakin, Obi-Wan, Yoda and Qui-Gon are Force Ghosts because Qui-Gon learned how to preserve their consciousness after death from a Shaman of the Whills. So the dualism would have to be in Anakin’s consciousness.