We would still need to establish that Leia has unfrozen Han, I think.
How about this:
-Crawl establishes that Luke is completing his Jedi training in isolation, leaving Leia and her allies to attempt Han’s rescue alone.
-Vader goes to the Death Star.
-Establishing shot of Jabba’s palace at sundown.
-Leia wanders through sleeping fortress, unfreezes Han.
-Sinister laughter from Jabba. “I know that laugh.” Cut to black.
-Indeterminate shots of Dagobah, darkness of the cave in the swamp. Voiceover from ESB. “Friends you have there.” “They were in pain.” “Decide you must, how to serve them best. If you leave now, help them you could…but you would destroy all for which they have fought and suffered.” Reveal Luke in a cave working on a lightsaber. He does not activate it.
-R2 emerges from crevice on Tatooine. “We’re leaving? But what about master Luke? I thought he was going to rescue captain Solo…You mean we’re going to that horrible fortress…alone?” Cut to the theatrical version “Of course I’m worried, and you should be too. Lando Calrissian and poor Chewbacca never returned from this awful place.”
Spence’s ROTJ edit has an opening pretty similar to this except he has the Luke/Yoda Dagobah stuff between the DS2 opening & Leia sneaking unto Jabba’s. He uses the ‘Luke walking to the X-wing before seeing Kenobi’ footage to fade in over Jabba taunting a newly thawed Han to sense they are in trouble. He didn’t include the deleted lightsaber build scene tho but it still works.