Brandon Sanderson Reveals Next Step for Mistborn Movie After Screenplay Update

Brandon Sanderson has completed the first draft of the Mistborn movie screenplay, giving Apple’s planned Cosmere adaptation its most concrete progress update so far. During his latest weekly YouTube update, Brandon Sanderson announced:

He also shared a photograph of the printed script on social media and said he was proud of how the draft had turned out. The celebration came with a useful warning. “This is an early step in a long process,” Sanderson explained, adding:

The 100% marker refers to one complete rough draft, rather than a finished shooting script, a production order, or a confirmed release plan. Brandon Sanderson’s official website now lists the screenplay at 100%, but neither Apple nor Dragonsteel has announced a director, cast, filming schedule, or release date. Fans have waited years to see Vin, Kelsier, Scadrial, and Allomancy brought to live action, making a completed draft a major milestone.

What Could Be Mistborn Movie’s Next Steps?

Credits: Youtube/Brandon Sanderson

Brandon Sanderson did not identify one official next task, apart from promising to share updates whenever contractual permissions allow. Based on the usual development process for a studio feature, the most immediate step will probably involve notes and further drafts. A first draft normally goes to producers, development executives, and studio decision-makers for feedback. They may request changes to structure, running time, character emphasis, dialogue, pacing, or the scale of individual sequences. The British Film Institute’s development guidance separates a first draft and revisions from later second-draft work, and it allows for several additional stages before a project reaches final pre-production.

Screen development can take considerable time, especially when an expensive fantasy property must introduce a new world without burying viewers beneath exposition. For Mistborn, those notes may concentrate on how much of The Final Empire can fit comfortably into one feature. The novel combines a heist, political rebellion, Vin’s education, Kelsier’s history, noble society, several magic systems, and the rule of the Lord Ruler. The film needs enough explanation for newcomers while preserving the character relationships that prevent the book from becoming a two-hour glossary.

Tor Publishing Group describes the series as combining a heist story, political intrigue, and epic fantasy, which captures the difficulty of adapting it without sacrificing one element for another. The screenplay may then receive a practical production breakdown. Producers and department specialists assess how many locations, sets, performers, costumes, stunts, creatures, and effects the story requires. ScreenSkills explains that production designers begin with the script and prepare budgets, while assistant directors examine cast, locations, equipment, and crew requirements. 

That assessment could prompt another rewrite. Steelpushing, Ironpulling, emotional Allomancy, mist-filled cityscapes, ashfalls, koloss, and Steel Inquisitors cannot be treated as inexpensive decoration. A visual-effects team may create early storyboards or previsualization for the largest sequences, then estimate what each approach would cost. ScreenSkills notes that productions involving complicated CGI must consider the creative and financial demands before filming begins. The magic system will also need careful adaptation. Allomancers gain powers by burning metals, but much of that happens internally in the books. The filmmakers will need a clear visual approach that explains the abilities without slowing the story, while effects-heavy powers like Steelpushing will require a mix of stunt work, wire rigs, and CGI.

A director is another key piece still missing. Once attached, they would work with Brandon Sanderson, Apple, and the producers to refine the script, shape the visuals, and help cast the film. Casting will likely begin after further development, though major actors could join earlier to help move the project forward. While Vin and Kelsier will draw the most fan attention, factors like availability, chemistry, scheduling, and commercial appeal will shape the final decisions.

The next major hurdle is securing a green light. Although Apple has the rights and a finished screenplay, the studio must still approve the budget, production plan, key talent, and schedule before filming can begin. The likely path includes script notes, rewrites, budgeting, director discussions, visual development, casting, and a formal production decision. None has been publicly confirmed as completed for Mistborn, so they remain informed possibilities rather than disguised announcements.

Apple and Brandon Sanderson Back the Mistborn Movie

Mistborn / Credits: Tor Books

The current adaptation carries more weight than previous attempts because Apple acquired screen rights to Brandon Sanderson’s wider Cosmere in January 2026. The company is developing Mistborn for feature films and The Stormlight Archive for television. TheWrap reported that both projects were in early development and named Blue Marble Pictures as attached to produce. The deal also gives Brandon Sanderson an unusually hands-on role. Reports say he will write, produce, consult, and retain approval authority, ensuring major decisions about Vin, Kelsier, Allomancy, and the wider Cosmere involve the series’ creator.

Progress on the first draft has moved rapidly. Brandon Sanderson reported roughly 50% completion at the end of March, 55% in early April, 72% by the end of May, and 91% in July before reaching 100% in the latest update (per Comic Book). Earlier coverage stated that Apple had not yet seen the half-finished version, although there has been no public confirmation about who has now received the completed draft. The books give Apple enough material for a substantial film franchise. Era One consists of The Final Empire, The Well of Ascension, and The Hero of Ages, while Era Two moves hundreds of years forward for the Wax and Wayne novels.

Brandon Sanderson’s official Mistborn page identifies The Final Empire as the opening novel, and Tor reports that the wider series has sold more than 10 million copies. The first film will also carry responsibilities beyond adapting one successful novel. Apple is considering Mistborn as the cinematic entrance to a connected literary universe, so choices involving terminology, worldbuilding, and Cosmere links may affect adaptations developed years later. Brandon Sanderson’s approval authority should help maintain continuity, although the movie must still function for viewers who have never encountered a Shard, an Allomancer, or the name Adonalsium.

No release window should be treated as dependable yet. Development can stall, change direction, or continue through numerous drafts before a studio commits to production, a reality Brandon Sanderson has discussed for years on his official adaptation FAQ. The encouraging difference is that Apple holds the Cosmere rights, Brandon Sanderson has substantial creative authority, and the first screenplay draft now exists in full. Which step should Apple prioritize now: appointing the right director, testing the Allomancy effects, or beginning the search for Vin and Kelsier? Share your choice in the comments, and follow FandomWire for more updates.

As of July 29, 2026, the Mistborn movie is still in development, with no confirmed production start or release date.