I agree that I’d have liked to see Luke haunt Kylo Ren in Ep9. But it doesn’t feel right to wedge in a sentence or two over voiceover. Luke is clearly introduced to us on Ach-To and by then there’s no Kylo Ren to haunt. I just don’t think it works.
What if we dispersed Luke’s dialogues with Kylo throughout the film, especially when Ren is alone.
For example
- when he holds Vader’s helmet he can have an inner dialogue with Luke.
- When he is on exogol on his way to Palpatine.
- When he telepathically talks to palpatine on the star destroyer.