"I'm not convinced that we have hit stability in the streaming market," Sanderson said. "Streaming has had a big problem with epic fantasy, and this has me worried. […] Streaming hasn't figured out epic fantasy yet." According to The Hollywood Reporter, Sanderson has signed "an unprecedented" deal giving Apple TV the rights to adapt his sprawling Cosmere fantasy universe. The Mistborn books are being considered for film adaptation, while the Stormlight Archive books would be developed for television.