Hahaha, that’s great. Man, the hype for TFA really wasn’t that long ago but it already feels like it… I’m also glad IX will be releasing in the winter time too. Star Wars just feels right in the winter for some reason.
I believe it is feasible. The primary issue would be that I don’t know if that wide shot of Snoke lasts long enough for the entire back and forth. You may either have to slow it down slightly, or cut to a close up of Kylo in the middle for when he says “the dark side” and then cut back when Snoke says “and the light”, using the entire length of that wide shot. You also might have to remove any background noise from “the dark side” line, and add some kind of echo to both that line and “and the light” to make it match with the rest of the dialogue, if the rest also has an echo.