First idea (not accounting for any adjustments that might have to be made within the bulk of TLJ)

Disclaimer: There are going to be LOTS of errors and holes here. I’m working blind due to not being intimately familiar with the content of each scene in TROS. Some of these may not work once scene specific dialogue is considered.

As per Poppasketti’s current work on having Palpatine’s ‘Find me’ come through the radio on Crait,

Resistence escapes.

TLJ doesn’t end here. We follow Kylo for a bit here.

First order of business? Reforge his mask.

(logic:- Kylo after being embarrassed by Luke on Crait, finds it easier to deal with the scheming minions from behind the mask’

Leads to:-

His ‘War council scene’:- somehow replace him heading out on his mission to find Rey to him actually heading out to Mustafar in search of the wayfinder.

Cue his slaughter scene and recovery of the wayfinder (He doesn’t need his mask to cut up random aliens alongside stormtrooper grunts, plus he’s trying showcasing his badassery to rebuild his credibility and demonstrate that he’s a hands on murderer kind of guy 😃 )

Cut to:-

A Rey and/or Resistance scene.

Probably Rey meditating/ doing her trials course?

(issues here:- making it clear there’s been a significant time jump…repaired saber etc)

To be continued as I spitball further ideas