A trailer for "The Exorcist: Martyrs" was unveiled Friday at New York Comic Con, with Scarlett Johansson playing a character tracking a demonic killer. The film is directed by Mike Flanagan and acts as both a sequel and a reboot of the long-running horror franchise.

Flanagan says the project draws heavily on "The Exorcist III" and describes it as the most frightening film of his career. He told reporters the film was designed to feel dangerous and that it made him wildly uncomfortable during production.