now I'm imagining an alternative Rise of Skywalker which still has the Rey-as-Palpatine's-granddaughter angle, but Kylo never turns good, he joins forces with Rey b/c as a Sith he's supposed to kill his master, and Sheeve trying to live forever as god-emperor isn't very Sithy. At the end he'd leave Rey and travel beyond the Rim, leaving potential sequels open.