So based on some of the comments and my ideas here is a basic outline that could work. There are other thinks I would like to work in but this would be the most plausible. Some of the transitions might be a little jarring so some work on this will still need to be done.
1. A New Hope begins as normal and plays out as normal until...
2. Falcon comes out of hyperspace and cut with more elaborate astoroid field from Empire Strikes Back. After being chased by some fighters, they start heading towards that small moon that is clearly a small moon and nothing else.
3. A New Hope continues until after the Tie Fighter chase, no homing becon secure aboard their ship. The Falcon arrives on Hoth using shots from the Yavin 4 arrival digitally replaced with the snow world.
4. Probe Droid is launched and lands on Hoth. No Wampa scenes since this would indicate a greater passage of time than has actually occurred within the edit. Han can't leave yet because his ship has been damaged from the prior battle.
5. Empire continues with Han running away with Leia and Luke going to Dagobah, although how Luke knows to go there I haven't worked out yet. I may have to find a way to work in the Wampa scenes somehow just so Luke can have his vision or maybe it can just be a dream. Falcon is on the run minus the asteroids and no going to cloud city. They eventually rendezvous with the fleet while Luke still trains. No relationship develops between Han and Leia. Since Luke and Leia won't be brother and sister in my edit, I'd rather keep leave who she ends up with up to audience interpretation.
6. Luke finishes his training with Yoda caped off with the scene from Return of the Jedi where Yoda dies. Certain bits will be removed for continuity purposes.
7. Breefing room but can't decide which one to use since both have their advantages.
8. Luke flies his X-Wing to the Death Star knowing he must confront Vader. The scenes with the Emperor will be cut in at various points earlier to show that Luke is expected and why he is able to get past secruety so easily. "Skywalker has just landed Lord" and "Good, see to it he finds his way here" could be dubbed in over the intercom in Vaders meditation chamber perhaps.
9. Luke fights Vader on the Death Star using the fight from Cloud City. This plays out all the way except Luke doesn't allow himself to fall and he doesn't loose his hand or his lightsaber. Luke is captured and taken to the Emperor. Luke's lightsaber will need to be rotoscoped blue since he never built a new one. Vader and Luke fight and the Emperor is killed. Vader is critally injured and Luke tries to save him but Vader tells him to leave him.
10. Luke leaves on the X-Wing and joins the Death Star battle. This battle with consist of a combination of the Endor battle and the Yavin battle. Han will be flying the Falcon and Luke will fly into the core with Han instead of Wedge. At some point Vader will suprise show up to help but be destoried (or he could just fly off at the end on his own). Leia will be in the War room from a New Hope and Tarkin will still be around at this point as well.
11. Death Star destroyed, A New Hope medal ceremony finale from Star Wars revisited so Chewie can get his medal.
Final note: This may seem wack but I almost want to try to set the final Death Star battle over Coruscant and use some prequel footage to have some of the Emperor scenes take place on the planet. Then I'll keep the Coruscant victory celebration from Jedi. Heck, the Cloud city fight could take place on Coruscant as well which might be easier to cut as I could use Cloud City as the Emperors palace or something.
I'm also thinking of using some Cloud City shots for the surface of Alderaan before it is destroyed since the cloud city designs were originally created for Alderaan but never used.
Bear in mind, still all just ideas at this point.