James Gunn called the Holiday Special "one of my favorite stories ever," with a story "as crazy and fun as can be" that he had "bugged
Kevin Feige endlessly about over the years." Gunn finished the script in April 2021, after initially writing the treatment "years ago." It took Gunn a few hours to write the script, and he noted featuring
Kevin Bacon was a quick inclusion once he had figured out the story for the special.