Hotel Transylvania: Transformania

During Hotel Transylvania's 125th anniversary celebration, Dracula is planning to retire and leave the hotel to Mavis and Johnny. Mavis overhears this and tells Johnny who excitedly tells Dracula his plans to renovate the hotel. Worried about Johnny ruining the hotel, Dracula lies that there is a "monster real-estate law" which only lets monsters own the hotel, leaving him disappointed. Professor Abraham Van Helsing decides to help Johnny by using a ray powered by a crystal that turns humans into monsters and vice versa. After testing it on his guinea pig Gigi, he uses it on Johnny who turns into a dragon. Learning about Johnny's monster form, Dracula tries to turn him back to normal but accidentally turns himself into a human, breaking the ray's crystal in the process. Van Helsing tells Dracula and Johnny that they can turn themselves back to normal by getting another crystal in the Cave of the Reflexión in South America, so Dracula and Johnny set off to do so.

In February 2019, Sony Pictures Animation announced that a fourth Hotel Transylvania film was in development. In October of that year, Genndy Tartakovsky confirmed that he would not return to direct. In September 2020, Jennifer Kluska and Derek Drymon were announced as directors. Kluska had worked as a storyboard artist on earlier sequels, while Drymon had previously worked on series such as Rocko's Modern Life, CatDog, SpongeBob SquarePants, and Adventure Time. Tartakovsky stayed on as screenwriter and executive producer, joined by Selena Gomez, who also voiced the character Mavis. Production was carried out remotely during the COVID-19 pandemic. In April 2021, the film's title was revealed as Hotel Transylvania: Transformania, and it was confirmed to be the final entry in the franchise. That same month, Sony announced that Adam Sandler would not reprise his role as Dracula. The role was taken over by Brian Hull, who had voiced the character in the short film Monster Pets. Kathryn Hahn, Steve Buscemi, David Spade, and Keegan-Michael Key returned to voice their characters, and in May 2021, Brad Abrell was announced as the new voice of Frankenstein, replacing Kevin James. Lynn Hobson served as the film's editor.

Mark Mothersbaugh returned to compose the score for the film, continuing his work from the previous three installments. The official soundtrack was released by Sony Classical on January 14, 2022. An original song featured in the end credits, “Love Is Not Hard to Find,” was written by Morien van der Tang, Faried Arween Jhauw, Glen Faria, and Jheynner Argot, and performed by Yendry. It was also released on January 14, 2022.

Hotel Transylvania: Transformania was released by Amazon Studios on Prime Video on January 14, 2022. In February 2019, Sony Pictures Releasing had originally scheduled the film for a theatrical release on December 22, 2021. The release date was later moved to August 6, 2021, then advanced again to July 23, 2021, and subsequently delayed to October 1, 2021, due to the COVID-19 pandemic. In August 2021, Sony Pictures cancelled the film's planned theatrical release and entered discussions to sell the distribution rights to a streaming platform, citing rising cases of the SARS-CoV-2 Delta variant in the United States. On August 16, 2021, it was reported that Amazon Studios was negotiating to acquire global streaming rights (excluding China) for $100 million. Under the agreement, Amazon would release the film exclusively on Prime Video, while Sony retained home entertainment and linear television rights. On October 6, 2021, Amazon confirmed the release date as January 14, 2022, coinciding with the tenth anniversary of the original Hotel Transylvania film.