Lucas originally planned for 3 trilogies, then decided to drop 7-9. 7-9 Were supposed to be about Han and Leia's children.
I used to have a link to a site where almost the entire movie was displayed in screenshots from the movie, even had some gifs of lightsabre battles, but it's down now. Judging from that site episode 3 will pwn 1 and 2.
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