The crew filmed for 900 days to create this 70-minute film.
Due to Disney's completed acquisition of all the Fox assets and further release date changes for future Disney films, this is the last time both a Disney film and a 20th Century Fox film have been theatrically released on the same day, with this film releasing on the same day as the 20th Century Fox film Breakthrough (2019).
Jo Frost was originally considered to serve as narrator.