One of the most poignant scenes in National Lampoon’s Christmas Vacation already teased the perfect opportunity for a prequel movie about a decades-old Griswold family holiday. Based on a short story by John Hughes, the holiday classic Christmas Vacation follows the exploits of the Griswold family tree, led by Chevy Chase’s Clark Griswold, as they gather in his Chicago home for an extended Christmas celebration. While Christmas Vacation is already a holiday-themed sequel to the 1983 Griswold-focused movie Vacation, the chaos of the family’s 1989 holiday shenanigans subtly teases the potential for another Christmas-centered narrative set 30 years prior.

https://screenrant.com/christmas-vacation-clark-griswold-flashback-prequel-movie-perfect/