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It will serve as a prequel to the story of 20,000 Leagues Under the Sea, detailing the origin of Captain Nemo, though it is as yet unclear if it is only a prequel to the loose story of the original Verne novel, or directly tied to the preexisting Disney film adaptation.
Nemo is an Indian Prince robbed of his birth right and family, a prisoner of the East India Company and a man bent on revenge against the forces which have taken everything from him. But once he sets sail with his ragtag crew on board the awe-inspiring Nautilus, he not only battles with his enemy, he also discovers a magical underwater world.
- Shazad Latif as Captain Nemo
- Georgia Flood as Humility Lucas
- Thierry Frémont as Gustave Benoit
- Ashan Kumar as Ranbir
- Pacharo Mzembe as Boniface
- Andrew Shaw as Jiacomo
- Arlo Green as Turan
- Tyrone Ngatai as Kai
- Céline Menville as Loti
- Ling Cooper Tang as Suyin
- Kayden Price as Blaster
- Damien Garvey as Director Crawley
- Richard E. Grant as Leader of Karajaan
- Muki Zubis as Casamir
- Benedict Hardie as Cuff
- Jacob Collins-Levy as Captain Youngblood
- Luke Arnold as Captain Billy Millais
A prequel or remake of 20,000 Leagues Under the Sea has been in development at Disney since at least 2009.
On January 6, 2009, Variety reported that a live-action remake titled 20,000 Leagues Under the Sea: Captain Nemo was being planned with Joseph McGinty Nichol, known as "McG", attached to direct. The film serves as an origin story for the central character, Captain Nemo, as he builds his warship, the Nautilus. McG has remarked that it will be "much more in keeping with the spirit of the novel" than Richard Fleischer's film, in which it will reveal "what Aronnax is up to and the becoming of Captain Nemo, and how the man became at war with war itself." It was written by Bill Marsilli, with Justin Marks and Randall Wallace brought in to do rewrites. The film was to be produced by Sean Bailey with McG's Wonderland Sound and Vision.
McG once suggested that he wanted Will Smith as Captain Nemo, but he has reportedly turned down the part. As a second possible choice, McG had mentioned Sam Worthington, whom he worked with on Terminator Salvation, though they did not ever discuss it seriously. In November 2009, the project was shelved by then-Walt Disney Pictures chairman Rich Ross after having spending nearly $10 million on pre-production work. Prior to the announcement, McG and Bailey had been notified of the project's cancellation.
During the 2010 San Diego Comic-Con, director David Fincher announced plans of directing 20,000 Leagues Under the Sea for Walt Disney Pictures based on a script by Scott Z. Burns. While Fincher was wrapping up The Girl with the Dragon Tattoo (2011), it was speculated that 20,000 Leagues Under the Sea would enter principal photography by late 2012. In the meantime, Fincher began courting Brad Pitt to play the role of Ned Land while the film was kept on hold. However, in February 2013, it was announced that Pitt had officially turned down the role.
In April 2013, it was announced that the Australian government will provide a one-off incentive of $20 million in order to secure the production. Despite this, the film was put on hold again the following month due to complications in casting a lead. On July 17, 2013, Fincher dropped out of the film to direct the adaptation of Gone Girl. Fincher revealed in an interview that he left the film because he wanted Channing Tatum for Ned Land, but Disney wanted Chris Hemsworth for the role. Additionally, the money originally allocated for the production of this film was redirected towards Pirates of the Caribbean: Dead Men Tell No Tales.
In February 2016, Disney announced that it was planning a live-action film titled Captain Nemo, with James Mangold directing. In February 2020, it was reported that Mangold was no longer attached to the project.
Nautilus was announced on August 23, 2021 at the Edinburgh TV Festival as one of several UK-based productions in development for Disney+, being developed and co-produced by Xavier Marchand and Anand Tucker, written by James Dormer, and executive produced by Johanna Devreaux. It is currently set to begin shooting in early 2022.  Shazad Latif was later announced to star as Captain Nemo. The rest of the cast was announced in February 2022 along with the announcement that filming had begun.
- Bastos, Margarida (February 17, 2022). "'Nautilus': Disney+'s '20,000 Leagues' Prequel Series Rounds Out Cast as Filming Begins". Collider.
- Georgia Flood, Thierry Frémont Join Disney Plus Series ‘Nautilus,’ Production Underway in Australia
- Richard E. Grant Joins Cast Of New Disney+ Original “Nautilus”
- Fleming, Michael (January 6, 2009). "McG to direct Disney's 'Leagues'", Variety.
- "Randall Wallace to Rewrite 'Captain Nemo'" (July 8, 2009).
- Graser, Marc (February 11, 2009). "Justin Marks rewriting 'Nemo'", Variety.
- Vejvoda, Jim (January 15, 2009). "Finding McG's Nemo", IGN.
- Morris, Clint (August 21, 2009). "Exclusive: Sam downplays 'Nemo'".
- "Disney sinks 'Captain Nemo'", Los Angeles Times (November 18, 2009).
- Rosenberg, Adam (July 28, 2010). "Exclusive: David Fincher Confirms That Work Continues On '20,000 Leagues Under The Sea'", MTV Movies Blog.
- Davis, Edward (January 9, 2012). "Sony Officially Plans To Make 'Dragon Tattoo' Sequels, But David Fincher Is Looking To Direct '20,000 Leagues' Instead", IndieWire.
- Sneider, Jeff (October 18, 2012). "Director courts frequent collaborator for role of harpoonist Ned Land.", Variety.
- Dibdin, Emma (February 12, 2013). "Brad Pitt 'turns down David Fincher's '20,000 Leagues Under the Sea", Digital Spy.
- Bullbeck, Pip (April 2, 2013). "Disney's '20,000 Leagues Under the Sea' Confirmed For Australia Shoot'", The Hollywood Reporter.
- Child, Ben (May 20, 2013). "20,000 Leagues Under the Sea remake put on hold", The Guardian.
- Davis, Edward (July 17, 2013). "Exclusive: Andrew Kevin Walker Rewriting 'Dragon Tattoo' Sequel; David Fincher's '20,000 Leagues' Is Dead", IndieWire.
- Jagernauth, Kevin (September 15, 2014). "David Fincher Says Differences Over Casting And Disney's Corporate Culture Stalled '20,000 Leagues Under The Sea'", Indie Wire.
- Child, Ben (September 1, 2014). "Pirates of the Caribbean 5 gets green light to shoot in Australia", The Guardian.
- Ford, Rebecca (February 25, 2016). "'Wolverine' Helmer James Mangold to Direct Disney's 'Captain Nemo'", The Hollywood Reporter.
- Shuler, Skyler (February 26, 2020). "'Ford v Ferrari' Director James Mangold In Talks To Direct 'Indiana Jones 5'", The DisInsider.