Ah cool.
And this idea could replace the Dyad concept entirely. Palpatine created the Skywalkers and Rey, so they’re really all one family, designed to share the power of the Force between them. The ‘Skywalker is just a good Palpatine’ is a nice angle, tying everything together.
The hangar revelation could be that Kylo is finally admitting that both Rey and the Skywalkers were created entirely by Palpatine for his own nefarious purposes, and so he tells Rey that their only hope in destroying him is if they act together.