They also disliked the darker elements in Whedon 's original script , wanting to make it a lighter comedy .
Executives at 20th Century Fox removed many of Whedon 's jokes , believing the humor to be too abstract for audiences .
20th Century Fox also disliked the darker elements in Whedon 's original script , wanting to make it a lighter comedy .
Executives at 20th Century Fox removed many of Whedon 's jokes , believing the humor to be too abstract for audiences .