You know, I can't believe I overlooked this. You're right, of course - Kylo Ren may have taken a new name and may have been born Ben Solo, but he is still technically a Skywalker. Ren rejecting the dark side of the force would a fitting way to wrap this up. My money is on Luke being a minor/advisory character as a Force ghost a la Yoda in the last one, and frankly I hope he ISN'T a major part of the action. One final thought - there's a lot of discussion here about JJ Abrams' potential storyline and Rian Johnson potentially deviating from it, with people here (myself included) having pretty strong feelings about the relative merits of each. That's beside the point, I think. The REAL issue here, IMO, wouldn't be that Abrams just did a rehash of A New Hope or Johnson deviated from storylines Abrams started, but that if that DID happen, that Disney had so little overall direction in where they wanted to take the storyline that they let Abrams write the first move, told him he'd write the third, and then let Johnson write the middle one, without making sure that the two directors were on the same page as far as major plotpoints like who Rey is and who they were going to fight. In fact, the idea that Disney could have hired two different writers/directors and just said, "you guys go figure out something, and don't necessarily talk to each other while you do so," and then washed their hands of the whole thing seems completely implausible to me. I'd never really bothered to look into what the two have said about the other's work, but a bit of googling suggests Abrams was pretty supportive of Johnson's decisions, and in fact the Rey/Luke who'd turned his back on the force storyline dated back to The Force Awakens originally before it was collectively decided to move that storyline further back into the series. So, I wonder how much of this narrarive of JJ Abrams creating a story, and then Johnson blowing it up, is even true - the two men seem to be pretty closely in sync here, and if anything JJ Abrams has zero patience for the "TLJ was a sell-out to SJWs" arguments, which would have me thinking if I were one of the guys pissed off about TLJ I wouldn't be holding my breath for a big about-face in The Rise of Skywalker.