Colin Trevorrow's Episode IX script leaked.

It's does have Palpatine but...as a left over holo message to Vader.

https://www.quora.com/Did-JJ-Abrams-always-intend-for-Rey-to-be-related-to-Palpatine-or-did-this-only-happen-after-The-Last-Jedi/answer/Mike-Prinke

Colin Trevorrow’s draft, titled Duel of the Fates, slated the Rey’s parents question as being adequately answered by The Last Jedi, with the only addendum being that Kylo Ren killed Rey’s parents, a fact that he reveals during their final showdown in order to spur on her aggression. One account of the draft stated that with his dying breath, he reveals that her last name is “Solana.”

Trevorrow’s draft was discarded extremely late in preproduction, after Carrie Fisher had passed away, and Abrams only took over Episode IX after The Last Jedi had already hit theaters. Screenwriter Chris Terrio has explained the rationale for Rey being Palpatine’s granddaughter very thoroughly in interviews following Episode IX’s release, stating that he and Abrams came to that decision together, thinking that it was the only thing Rey could hear that would be more distressing than hearing her parents were nobodies. In one interview he basically frames it in a way where they liked Rian Johnson’s reveal so much that they wanted to do it too, but they wanted to one-up it, stating that he thought it was “too easy.”

No, it doesn’t get more cogent when he explains it.

The most plausible explanation for the reversal in direction is that Lucasfilm knee-jerked at the complaints stemming from toxic fans after The Last Jedi, threw out the plan for Duel of the Fates over that and Carrie’s death, and purposely outlined a series of bullet points for Abrams and Terrio to hit in order to fulfill an imaginary fan-wishlist. However, Terrio’s comments and Trevorrow’s draft make it exceedingly clear that Rey Palpatine was essentially an 11th hour decision.

I read some details.

I didn't like that they changed Palpatine's master to that goblin creature instead of Darth Plagueis the Wise, but the return to Corusant stuff sounded interesting.

I also liked the idea of Luke's ghost haunting Kylo. The final battle with the force ghosts sounded cool too. Much better than just hearing the voices like in the actual film.

Force ghosts haunting their killers is something i've long considered. Always thought that was a great idea.

And TC-14.

NOOOOOOOOOOOOOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!