After last week's big news that Brandon Sanderson's Cosmere universe would be coming to Apple TV, the author has already offered up some progress on the upcoming Mistborn movie. More specifically, Sanderson has revealed a progress bar on his website for the project that indicates he is already 2% done with the script.
Sanderson took to his Youtube channel to discuss some of the details of his new Apple TV partnership, saying he's been looking for a partner to adapt his books for quite a while and started doing this latest round of pitches in Hollywood back in May 2025.
"I've been looking for a partner, not somebody just to sell things off to," he explained about his decision to strike a deal with Apple TV. "This one feels different."
He went a bit further into his reasons for choosing Apple over everyone else; "I really liked the vibe, but I like the vibe with a lot of these meetings. There weren't any bad meetings in the group. Part of it was the amount of control that Apple was willing to offer me. But it's less about control and more about the partnership."
Sanderson confirmed that they are still planning Mistborn as a feature film and Stormlight Archive as a series, but that nothing is necessarily set in stone. Although this is currently the trajectory, he said "that could change as we work and develop these things."
He also confirmed his involvement in the Stormlight Archive series, commenting: "I will be the co-showrunner with someone. So, we're going to be hunting down that person." Sanderson will reportedly have approvals on every project in this partnership, which will require him to be "deeply involved" in the development of each one.
Sanderson also addressed the elephant in the room regarding his upcoming books, confirming that these projects will indeed impact his writing schedule, but "not to the point that I think you need to worry."
With George R.R. Martin's final Game of Thrones book seemingly on indefinite hold after years of the author working on TV shows, this is a sigh of relief for fans worried the same thing will happen to Mistborn or The Stormlight Archive. You can currently see the progress of all of Sanderson's writing projects on his website alongside the Mistborn script. The next book, which kicks off the third Mistborn Era, is still currently slated for a 2028 release.
With the deal still fresh, it's likely going to be a long time before we see any of these Apple TV projects come to fruition. In the meantine, you can check out which books to read before the on-screen adaptions. You can also read IGN's full timeline of The Cosmere books for a deeper dive into Sanderson's sprawling literary universe.
Jacob Kienlen is a Senior Audience Development Strategist and Writer for IGN. Born and raised in Portland, Oregon, he has considered the Northwest his home for his entire life. With a bachelor's degree in communication and over 8 years of professional writing experience, his expertise is spread across a variety of different pop culture topics -- from TV series to indie games and books.
