The Exorcist was greenlit for a first season. In February 2008, American playwright John Pielmeier expressed an interest in adapting William Peter Blatty's novel of the same name into a play and soon met with Blatty. He then began working on a script for the play, in which the first draft was completed in ten days. "The Exorcist" first premiered at the Geffen Playhouse, Los Angeles in 2012. A horror VR video game, called "The Exorcist: Legion VR", was published on Steam, Oculus and PlayStation in 2018 and was based on the events of "The Exorcist III". In November 2009, it was
The Exorcist into the legitimacy of Merrin's exorcism of Regan in the first film. In flashback sequences, we see Regan giving Merrin his fatal heart attack, as well as scenes from the exorcism of a young boy named Kokumo in Africa many years earlier. "The Exorcist III" appeared in 1990, written and directed by Blatty himself from his own 1983 novel "Legion". Completely ignoring the events of "Exorcist II", this book and film presented a continuation of Karras' story. Following the precedent set in "The Ninth Configuration," Blatty turned a supporting character from the first film – in this case, Kinderman —