Hmmm I'm trying to figure out ways to write this but my brain is failing me at the moment.

The prequel trilogy is the back story so it doesn't really exist with out the main story that is the OT.

When Lucas wrote the story for his science fiction fantasy movie The Star Wars he came up with an outline for the universe of sorts. A back story for General Kenobi and Luke's Father and the grand republic before the tyrannical Empire.

It was used to help flesh out the characters and universe a little bit. That's it.

When that one movie became successful he used what little story he hadn't used and made two sequels. Creating an empire himself he thought he could do one or two sequel trilogies and using his outline a trilogy set before SW based on the adventures of young Ben Kenobi.

That outline became pretty useless after SW '77 anyway. Before that Vader and Luke's Father were two different people and the Empire was corrupt bureaucracy not a successful Sith plot to take over the universe.

So based on all this I don't think your hypothetical can be answered.

edit: when I was talking about my brain failing me I was trying to think of a literary or even a film comparison.

So far I can't think of anything maybe some one can help me out.