Let’s get a full-blown evil Sith - no redemptions!
As much as I’d hate a Yoda origin story, I’d be okay with a Palpatine origin story. Obviously this is too early in the timeline for him to be around, but I’ve always liked the idea that he was older than he let on. An age some consider to be unnatural.
But who’m I kidding, it’s obviously be based around new characters with a healthy (or perhaps unhealthy) dose of “remember this?” thrown in.
Remember how the first two seasons of Star Wars Rebels hinted strongly at Ezra falling to the dark side?
No, I really don’t. He seemed to be continuing down the standard Light Side path, complete with a normal amount of temptation.