The following is an excerpt from Time magazine May 19 1980.  I believe
this is where most of the information came from regarding the 9 part
Star Wars series:

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[The very first surprise in The Empire Strikes Back comes in the
opening credits: the movie is identified as Episode V.  Since it is
the immediate sequel to the original Star Wars.  That opus has been
retitled Star Wars: Episode IV A New Hope, raising a meteor shower of
questions.  The answers: Lucas has begun his space saga in the middle,
and both pictures are the centerpieces of a projected nine-part
series.  The remaining movies, fore and aft, have not yet been laid
out in detail, but Lucas hs the framework, a kind of history of what
happened in that galaxy long ago and far away.  A preview:

	For years the universe was governed by a republic, which was
regulated by the order of Jedi Knight who bore a vague resemblance to
Japanese Samurai warriors.  But eventually the citizens of the
republic "didn't care enough to elect competent officials," says Lucas
the historian, and so their government collapsed.  A sorcerer, a bad
counterpart of Yoda, blocked all opposition and declared himself
Emperor.  He was not seen in Star Wars: Episode IV, but he makes a
brief appearance in The Empire.
	The Emperor subverts Darth Vader to his side, and together he
and VAder betray the other Knights, nearly all of whom are killed in
their trap.  Ben Kenobi escapes, and after a fierce struggle he does
such injury to Vader that forever after Vader must wear a mask and
that noisy life-support system.  The fall of the republic and the rise
of the empire will form the first of Lucas' three trilogies.
	The second trilogy, which opened with Star Wars: Episode IV,
center on Luke Skywalker, who will be seen as a child in Episode III.
The Empire continues the Skywalker story, and Episode VI, the next
film to be made, which will be called Revenge of the Jedi, will end
it, with either Luke or Darth Vader walking away from thier final
bout.  The last three episodes involve the rebuilding of the republic.
	Only two of the main characters will appear in all nine films,
and they are the robots, Artoo Detoo and See Threepio.  Says Lucas:
"In effect, the story will be told through their eyes."]

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Notice the only mistake in the ariticle is the title "Revenge" which was  
later changed to "Return".  

Frank Williams			"Notice everything, save you it can"