Back to the OP; certainly interesting to think how the story could have evolved with Vader, Anakin, and Kenobi being 3 completely separate characters, but also good friends.
Is there any fan fiction continuing on the premise in Leigh Brackett’s 1978 draft of Empire Strikes Back? Or similar media such as an “animated comic” type story?
I have not found any. I hope someone else knows of some as it is such an interesting idea.
The fan community’s more concerned with animated adaptations of EU stories and comic adaptations of Colin Trevorrow’s rejected Duel of the Fates script. Blecch.