That's a nice idea Kongerne, but I agree with the poster above that it's way too much. Still, that's a cool picture.
Wasn't Return of the Jedi supposed to be set at Coruscant (then called Had Abbandon or something like that) and wasn't Endor supposed to be that planet's moon and the homeworld of the Wookiees?
I'm just thinking aloud here, but could it be possible to work those ideas in an edit of ROTJ? It would require a lot of work though. The scenes on board of the Death Star could be set in the Emperor's palace by rotoscoping Coruscant outside of the window as Kongerne suggested.
Endor could easily be turned into Kashyyyk, they are both forest worlds. There is some blue screen footage of Wookiees on the ROTS DVD that might be usable too.
As I said, just thinking aloud...but a change of scenery might help ROTJ.