system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Was Darth Vader's origin widely known in detail before the prequels?

To what extent was the origin of Darth Vader known? Are there any comics that were retconned by the prequels?
gpt
Lucas had said "final battle with Obi-won on a volcano planet" in interviews before the original trilogy. Now, the prequel era was purposefully left vague by the comics and novels after the original trilogy concluded.   


Some comics and novels got rewritten, mainly the really early ones that had Darth Vader and Anakin Skywalker as two separate people who Obi-Wan was training.