Vader hunting down and killing the Jedi instead of order 66, Anakin’s wife living and going to Alderaan with Leia. I wish i could find the article talking about it. The one Lucas came up with in the 1980s. It also has Palpatine as a Nixon type who subverts a democracy.
I believe it might be touched upon in Paul Duncan’s book but i don’t have that one myself.
Is it one of these?
Star Wars prequels were mapped out in 1981, only nothing like the way they turned out - from Rinzler’s Making Of ROTJ book.
Interesting Hypothesis of the Prequels Story from the Mid 90’s - John L. Flynn’s PT story
There are more similar threads in the ‘General Prequel Trilogy Discussion’ part of the An Index for Beyond the Original Trilogy, so it could be in there if it isn’t in the above two threads?