Oh, come on! Lucas had little to do with production of the Holiday Special.
So far the story goes Lucas had little to do with production of Howard the duck

but the movie let to end of allot career in Hollywood:
Frank Price quit his job as the head of Universal Pictures, the studio that funded the film.
Willard Huyck Director of this box-office Bomb, was that his last feature film...
Gloria Katz who produce the movie needed 8 year for second chance to produce a feature film "Radioland Murders", the Ultimate Boxoffice Bomb...
Jeffrey Jones and Lea Thompson career survived this, thank to cult classic like "Ferris Bueller's Day Off" and "Back to Future Trilogy"
Alternaive Director
John Landis was originally slated to direct this film, but he dislike the Skript
Lucas take Huyck (script writher from "American Graffiti") despite Huyck last movie "Best Defense" was also box office bomb
Lucas had hoped that movie would bring $50 million profit for financing Skywalker Ranch complex
instead the Movie forces Lucas to pay one million to Universal Pictures to cover the production cost !
Now Lucas was forced to sell parts Skywalker Ranch complex and Division of Lucasfilm
one of Division was new CGI animation company buy by Steven Jobs, it's name PIXAR...