Mike Flanagan is not just one of our modern horror masters, but he's proved to be one of the very best there is at adapting Stephen King's work for the screen. Between "Gerald's Game" and "Doctor Sleep," he's done the unthinkable not once, but twice. Two of the least-adaptable King novels were brought to life in brilliant fashion. Now, Flanagan is back with another King movie in the form of "The Life of Chuck," which is earning rave reviews on the festival circuit. However, it turns out Flanagan almost lost that opportunity thanks to his currently gestating adaptation of "The Dark Tower."

King's "The Dark Tower" series is his magnum opus, consisting of multiple novels spread out over decades. Flanagan is now working on adapting those books into a show. That's great news for fans of King's work. However, as the filmmaker recently noted in an interview with Vanity Fair,...