This could be good. I also had the idea of maybe Kylo saying that if Rey kills him, she’ll fall and join Palpatine. Like he saw her kill him in a vision, which would be surprising to Rey. So when she almost kills Kylo, it’s what triggers her to go to Ahch-To. So kinda similar to your idea, but a little more big picture with destroying the Skywalkers in general.

I might try to see if I have time to mess with the scene and make clean audio for people to insert dialogue into. If we wanted to replicate the audio 1:1, the new dialogue would need to echo into the other channels. But I could at least make clean channels and then once dialogue is decided, those lines could be added to the other channels.