I recently learned that the Starship Troopers movie started out like this.
To quote Wikipedia
Development of Starship Troopers began in 1991 as Bug Hunt at Outpost 7, written by Neumeier. After recognizing similarities between Neumeier’s script and Heinlein’s book, producer Jon Davison suggested aligning the script more closely with the novel to garner greater interest from studio executives.
I recently learned that the Starship Troopers movie started out like this.
To quote Wikipedia