Johnson will co-produce and star in "The King", a film about king Kamehameha Kūnuiākea, founder and first ruler of the Kingdom of Hawaiʻi. The project will be directed by Robert Zemeckis from a script written by Randall Wallace. The movie will be comparable to "Braveheart" in tone, given Wallace's work on both films, and will depict the king's role in resolving the wars among the islands of Hawaiʻi. "The King" was scheduled to begin production in 2020, but was halted by the COVID-19 pandemic. Johnson is also attached to produce/star in a sequel to "Big Trouble in Little China", as well as project under development with Shane Black focusing on a new interpretation of Doc Savage. In April 2018, he announced that he is working on a film that will include Chris Pratt as his co-star. On November 14, 2019, he announced a December 2021 release date for the standalone "Black Adam" film.