…in the theme of ideas:

Has anyone considered the viability of this?

Do away with ‘Mustafar’ (bear with me)…but keep the slaughter sequence?

Repurpose it.

Start the movie with Kylo dropping out of HS . Landing on EXAGOL!..

There’s your establishing sequence! Then repurpose the slaughter on Mustafar (via colour correction) to have Kylo killing the cultists in order to get to/into Palpatine’s lair? (Instead of it being to find the way finder)

Keep it all, but make two sequences across two planets, just one???