Why did Lucas think it was a good idea to make Leia Luke's twin sister? Especially when he'd already introduced the whole romantic subplot in the first two films? WHAT WAS HE THINKING?!
Best way I can put it is mouth moving faster than brain and the people actually making ROTJ not calling him on it. He originally came up with the idea after Mark's accident. He and Mark were talking about it and Mark asked him straight up whether if he'd died George would have recast Luke going forward, and George said no, he'd have brought some other Jedi trainee forward, maybe Luke's "long-lost brother or sister. Something genetic, so that the Force would be with them."
Later, from a story conference running November 28 to December 2, 1977:
George Lucas said:
I also want to develop Luke's sister. The idea is that Luke's father had two children who were twins. He took one of them to an uncle on one side of the universe, and one to the other side of the universe, so that they would be safe. If one got killed, the other wouldn't even know that the other one was there. She also becomes a Jedi -- she's doing he same thing simultaneously that Luke is doing. Eventually in some episode, not this one, we could cope with Luke and his sister, and how she is the female Jedi and he is the male Jedi.
Luke gets his awareness of his lost sister through the Jedi training. We can come up with some interesting pieces of background.
Note that at this point, Anakin and Vader are still separate people.
Also, "The Academy." What "Academy" is this? Luke talks about going to it, but says he hates the Empire, so, is it an IMPERIAL Academy? What's the deal?
I'm annoyed at the EU writers/artists who put in the whole notion that it
was an Imperial Academy. Biggs flying TIE Fighters and Tank being an Imperial officer in the comics... We've had the script since the late '70s. The novelization, comic adaptation, and storybook all have Luke's reunion with Biggs -- it was only cut back out of the film pretty late before release. I would honestly love to see it canonized as taking place a few weeks or months earlier (and Luke not seeing a space battle over their planet), so Biggs actually has
time to get back to his freighter and jump ship and find the Rebels and get into Red Squadron and fly a mission or three... That's also not any kind of Imperial uniform Biggs is sporting in Anchorhead. My take for a couple decades has been that it's an Outer Rim merchantmarine academy. Biggs' main point when talking to Luke is that he's been posted to a
freighter, the Empire is nationalizing
trade in the core systems, and it's only a matter of time before it turns its attention to the Rim. Sounds merchantmarine-y to me...
As far as the Jedi, the Force, and people regarding them as myths... It's a big galaxy. The Prequels showed us that the Jedi had their temple near the capitol on Coruscant and stayed pretty aloof. I'd say most people in the galaxy would go their whole lives without ever encountering one, maybe not even hearing about them. Especially if you come from a planet/culture/family who's been detached from such things for a long time. I'd draw parallels within Imperial ranks to wealthy families in the US and UK over the 19th and 20th centuries, who sort of hd their own societal bubble outside of which they didn't care. The salt-of-the-earth types would still know about and maybe even be in touch with the Force, but they didn't have any socio-political clout. The Wookiees, the Alderaanians, the Chandrilans... Hippy-dippy peaceniks like that would be sneered at by families like the Tarkins and Mottis and Veerses. We know the galaxy in
general doesn't necessarily regard the Jedi/Force as a myth -- we only see/hear that from high-ranking Imperial officers. Odds are they achieved those ranks in part by being exactly the kind of blind, self-serving, oblivious tools the Emperor wanted working in his war machine.
--Jonah