Creator Couple: Husband-and-wife duo Robert Lopez and Kristen Anderson-Lopez continue to be the composers of music for the franchise, after having done the first movie and the Broadway musical.
The Foreign Subtitle: The Italian version has the subtitle "Il Segreto di Arendelle" ("The Secret of Arendelle").
Meaningful Release Date: Given the amount of autumn imagery we've seen in the trailers, its domestic (North America) release being in November, when it's autumn/fall in that part of the world, is quite fitting.
Reality Subtext: The character of Ryder is named for co-director Chris Buck's late son Ryder Buck, who was killed in a car accident in October 2013, one month before Frozen was released, and to whom he, Jennifer Lee and Peter Del Vecho dedicated their Best Animated Feature Oscar to in February 2014.
Release Date Change: Originally was scheduled for a November 27, 2019 release, six years to the day of the release of the first Frozen. However, the release date was bumped forward a week to November 22nd.
Role-Ending Misdemeanor: After Pierre Taki, Olaf's Japanese voice actor, was arrested for cocaine usage, Disney announced plans to replace his Japanese voice actor for all Frozen related material, including the first movie (to maintain consistency with the sequel) and Kingdom Hearts III.
Sequel Gap: It's slated for release on November 2019, six years after the first film was released. In-universe, however, the film takes place in half that time.
Spoiled by the Merchandise: Most of the books, such as the Golden Book adaptation and the official picture book adaptation, leave out the flashbacks and the ending to avoid this. However, one book, which isn't even an adaptation of the sequel but a book about storytelling in the general Frozen franchise spoiled the ending.
The poster does not feature a proper snowflake since it doesn't have six sides. Instead, the image is a stylized vegvisir (a 17th century Icelandic magical stave) that they designed to look like a snowflake, featuring four significant crystals.