1989's National Lampoon's Christmas Vacation was the third film in the Vacation series and the only reason the franchise's regular screenwriter John Hughes agreed to write it was because he actually felt he had a good story. The story for the film was actually based on a short story Hughes had written in the December 1980 issue of National Lampoon magazine, titled Christmas '59. In Hughes own words:
"The studio came to me and begged for another one, and I only agreed because I had a good story to base it on. But those movies have become little more than Chevy Chase vehicles."
The film has gone on to become a holiday classic so it seems Hughes' instincts were quite correct. Stay tuned!