http://en.wikipedia.org/wiki/Star_Wars_sequel_trilogy
Yes, I'm a bit of a nerd. Please don't get me started on Star Trek.
(Incidentally, the narrative of _The Secret History_ means that this sale is particularly interesting; we can see the sale as the definitive death of Lucas's youthful dream of a paradise for indie filmmakers like he was, who were going to revolutionize the staid Hollywood establishment of bloated corporate giants like Disney, the dream which motivated him to produce sequels to the standalone movie _Star Wars_ as cash cows.)
There is also the extended universe (which has traditionally been recognized as canon) that is quite clear about what happened after Return of the Jedi, so there's plenty of material, assuming they don't toss away the entirety of the extended universe...