Well you could set them up but I feel there’s not really room for both them AND Palpatine as the big bad while neither are developed where they really responsibly should be by the third act, one would seriously have to go or at least go under developed. RJ isn’t obligated to answer all the questions but I think he and JJ were too precious about each other’s ideas and it mutually made them stay away and go “I’m not touching that.” leading to leaving the thread just hanging in the air. It’s less about what I want and more working with what you got. I don’t think the Knights of Ren were even what I would have wanted but it is a lot of new potential left over, I think they were caught up in their own stories they didn’t pick up the ball and see what the trilogy needed at large. Course JJ has his own issues fully fleshing out concepts and characters, Maz really ended as a prop and pretty redundant to have initially received so much attention, JJ also fumbled Phasma all on his own in just one movie.