Frozen II [2019] (2 discs)

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• The song used to call Elsa to the enchanted forest is a type of Scandinavian herding call called kulning. It was used briefly in the score of the first movie. In Frozen 2, the kulning that is central to the plot is performed by Norwegian singer Aurora Aksnes.
• Olaf's lines about the non-existent character "Samantha" were improvised by Josh Gad.
• In the beginning when young Anna and Elsa are playing with snow figurines, a figure resembling Baymax from "Big Hero 6" can be spotted in addition to one resembling Totoro from "My Neighbor Totoro," a little elephant that looks like Dumbo, and a Snow White figure.
• Olaf's statement that turtles can breathe out of their butts is actually a real phenomenon known as cloacal respiration and occurs with several species including painted box turtles, eastern snapping turtles, and Fitzroy river turtles.
• In a flashback, Prince Agnar says he's reading a book by "some new Danish author." This is probably an allusion to Hans Christian Andersen, whose fairy tale, "The Snow Queen," inspired the plot of the original film.
• At one point the wind spirit blows up from under Olaf and he makes a motion with his hands in a similar fashion to the iconic Marilyn Monroe dress blowing image from The Seven Year Itch (1955).
• Since Elsa was never barefoot in the original movie, the animators didn't bother giving her toes then. They had to remodel her feet with toes for the sequel.
• Evan Rachel Wood (Iduna) is younger than both Kristen Bell (Anna) and Idina Menzel (Elsa), who play her onscreen daughters.
• The water spirit is a horse. In Norse mythology, Nix/Nokk were water spirits that often took the form of horses in order to lure humans onto their backs and then drown them. The fire spirit is a salamander. In European folklore, it was said that salamanders were produced by fire and could withstand its heat, even eating fire for food.
• At the end of the first film, Elsa gives Olaf a small, magical snow cloud which hovers over his head to keep him from melting. This cloud is visible throughout {Frozen Fever (2015)}, but not in {Olaf's Frozen Adventure (2017)}, which takes place in a December, after the events of this film. There was originally a song in this film, sung by Olaf, called "Unmeltable Me" which explains how Elsa's magic has gotten more powerful, enabling her to make him unmeltable without the cloud. In the finished film, however, the only hint we get of this is Anna's line "enjoying the new permafrost?"
• A longstanding fan theory (jokingly endorsed by the film's directors) was that Anna and Elsa's parents didn't drown, but actually washed up on the shores of Africa where they had a son, who went on to become Tarzan (1999). This film seems to dispel that theory by revealing the details of the Royal couple's fate. It also appears to debunk a theory that they were on their way to the wedding of Rapunzel and Flynn Rider and that Ariel found their sunken ship in The Little Mermaid (1989).
• There are several "Hidden Mickey"s in the movie (a common easter egg of Disney Films). When Elsa is singing the "Into The Unknown" number, at one point when she spins around she creates a circle of ice on the ground. For a split second two circles appear at the top making it resemble Mickey Mouse. In the charades scene, Olaf acts out a "mouse" and has his coals at the top of his head and on his nose making him resemble Disney's Mickey. In the forest scene where the main characters are surrounded by the Northuldra people and Arendellian soldiers, Elsa freezes the ground into a Mickey Mouse head shape for those running at them to slip on. A hidden Mickey appears as a hole in the top left corner of Anna and Elsa's parent's wrecked ship.