Idk. It’s a real stretch goal that would require a lot of technical wizardry. The sets themselves would be unaltered, but the windows in the RotJ throne room would need an atmosphere and coruscant traffic, and establishing shots would need to be completely replaced. I have toyed around with making Rey walk through the raised corridors of the Jedi Temple on her way down. I’d need many shots of her making the journey, honestly.

And that doesn’t even cover what to do with the ground and space battles in both films. What is the shield protecting if there’s no Death Star? Are the star destroyers stashed on the most populous planet in the Galaxy? Maybe if I remove the planet killers underneath, I can have the threat just be the hidden fleet emerging from hyperspace to lay siege to Coruscant. The battle would take place in the upper atmosphere to minimise background replacements.