There is no redemption. He needs to die like a dog. He murdered his father. He murdered his mentor. He murdered all of his fellow students. He attempted to murder his uncle. He either needs to win and the trilogy ends on down note or he needs to die.
I don’t see any reasonable way he can turn to the light and survive. He was part of the murder of an entire system.
You’re almost 35 years too late.
Is this in reference to Vader? Because his death was part of his redemption. There is no logistical way he could have survived and returned with Luke to the Rebels.
Also, I don’t think we actually saw Vader kill any Rebels in the OT. Kylo ordered the murder of an innocent village of people in TFA. He’s gotta die or win.