system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] If Vader had survived after killing the Emperor, what would've gone down?

Specifically, what would the dynamic be between him and Luke? Would Vader want to continue the Sith tradition and make Luke his apprentice? Would Vader simply be good and go back to the light, ending the Sith?
gpt
Considering that in his last moments after killing Palpatine he gave up the dark side, there's no way he'd consider continuing the Sith traditions.

His destiny meant that he ends the Sith, and with giving up the role of Darth Vader and casting Palpatine down, he does exactly that - survival or not. Barring some weird AU that goes against his characterization and everything he says and does in RotJ, he's not going to turn back to the dark side. He gave that up because of Luke's efforts.