I would have produced a remake of the OT first *SHOCK*. The controversy alone would have sold hundreds of millions of tickets. All live-action principle photography for the new OT in the space of three years (or less, if possible). As much of the post-pro and FX work and so forth on V and VI would be put off as long as possible to allow IV to finance the follow-ons. Try to design the new OT to be converted to 3D when the tech permits (now.) "Insubstantial" is a good word to describe the trouble with current CGI. It can be used to very good effect in a great many places, but it should not be overused. If actors in costumes can do the job about as well, they should. All shots meant to be outdoors should be shot outdoors, with natural light and air and as many real elements as possible, even if it is in front of a green screen. I found the "video game" environments in AOTC a little disorienting. They were spectacular and worthwhile in their own right, but it interfered a little with sus-dis. As many real elements as practicable in the sets. The purpose would be to create an OT that is perfectly consistent within itself in mood, tone, FX and so-forth. THEN produce a new PT that is perfectly consistent with the new OT.
For the PT, at first, I was just trying to work out enough backstory to understand the OT. Also, I was playing a game to see how well I could guess GL's backstory, when it was finally revealed. After ROTJ, I needed a working concept of the backstory. I never really tried to divide it into a trilogy or develope full storylines. When TPM came out, it's basic story became canon, so far as I was concerned (it is GL's intellectual property.)
It would be nice to know there is a record of my SW experiences somewhere. If you will forgive me, I'll drop them here. Feel free to by-pass.
In the summer of '77, I imagined a trio/triangle with Luke's mother, father, and young Jedi Vader. They were all around twenty. I thought they would be best friends and go on clone war adventures with each other, led by Ben. Luke's mother was also very special. She had Force powers that were different from the Jedi. She could see the future a little and influence others in a positive way. Jealousy played a part in Vader's fall. Different worlds created clone armies to fight each other and it was up to the Jedi and "Force Women" to put a stop to the fighting. I had guessed that there were only a few hundred or a few thousand Jedi (Han and the ImpOffs thought it was all myth), and that Senator Palpatine must have great force power (to control Vader), and that the capitol world must have an enormous city larger than all earth cities combined (If they could build a DS.) I didn't guess that the Jedi had a central HQ. I thought they were more scattered. That's about it in '77-'78. :)