Originally Posted by starbase63
Think way, way back...in early versions, there were five main characters...the gallant knight/wizard, his faithful sidekick, the young princess, and the two droids...the knight/wizard was split into Obi-Wan Kenobi and Han Solo, the Princess into Luke and Leia.
I'm not very familiar with SW at that stage of conception. My understanding though is that when Lucas began shopping his idea around there was just one script/treatment, which upon further revision he began working the first third of that script into what eventually became the movie script.
I don't know at what stage he began conceiving SW as a multi-generation saga, although presumably that idea was in full force by the time Empire