 They also conceived new aliens, planets, and the notion that the Emperor, not Darth Vader, is the true villain.Brackett's treatment, delivered on February 21, 1978, is similar to the final film, but Anakin Skywalker appears as a ghost to instruct Luke, and Vader is a separate character.Lucas was disappointed with Brackett's draft, but before he could discuss it with her, learned that she was in the hospital; she died of cancer in mid-March.