I’ve had a surprising idea for a radical restructuring of ROTJ - end it with TLJ’s Broom Kid finale. Give it a subtitle like “30 years later” or something like that, and show Luke’s story to be a myth inspiring people around the galaxy to find The Force. It wouldn’t work in a more faithful fan edit, but in something that tries to reinterpret the OT/saga, it could work.
This kinda rips off the idea of Luke Skywalker and the Shadows of Mindor (legends of Luke vs. reality of Luke), but that’s a good legends novel to emulate.
Honestly, I’ve had the same sort of idea as a hypothetical little experiment. Ending ROTJ as is but then pulling a Harry Potter and creating an epilogue scene using footage from TBOBF and The Force Awakens to show a new unnamed Jedi student approaching Luke Skywalker to wordlessly ask him train her in the ways of the Force.