James Wan‘s The Conjuring is one of the most successful horror movies ever. It was such a smash that it revived our genre and brought it into the summer, once considered a death blow for horror.

It performed so well that Warner Bros./New Line Cinema quickly spun off the haunted doll, Annabelle, into its own franchise. It too was a booming success. With a sequel set to film this fall, and Wan’s The Conjuring 2 dominating the box office, again, the studio has set their sights on the next spinoff.

The worst kept secret is that Conjuring 2 opens with the Amityville Horror case, which led many to believe that it would be the next standalone franchise. But, with Dimension Films’ Amityville sequel set for release in January, and a handful of crappy ripoffs on the home video shelf, it appears Wan and the studio are going in a different direction…with THE NUN!

David Leslie Johnson, who co-wrote Conjuring 2 (and is working on A Nightmare On Elm Street for New Line), has been hired to pen what is being titled The Nun, reports THR. James Wan, who directed the Conjuring movies, and Peter Safran, who produced them, are reuniting to produce the spinoff.

Here’s the awesome backstory, which is going to blow your mind: What is noteworthy about the demon nun character is that she didn’t exist until about three months before Conjuring 2 opened as she was only added during last-minute reshoots.

Explains the site: The studio and Wan had a cut of the movie, which stars Patrick Wilson and Vera Farmiga as paranormal investigators, in which the antagonist was a demonic figure with horns. The studio was ready to release that version but at the last minute, Wan was struck by a revelation. And so he came up with a new concept, a demon nun, which he pitched to New Line execs. And even though the late-in-the-game change could have spooked some execs, they gave him their blessing.

The shoot took place in March, just three months before the movie was scheduled to open on June 10. Some of the changes were minor: the art piece that Wilson is painting was altered digitally as the horned demon made way for the demon nun. Some were more extensive such as a set-piece in which Farmiga watches in terror as a shadow crawls across the wall to line up with the painting and…

Lights Out director David F. Sandberg is currently developing Annabelle 2, which he tells us “will be the Godfather II of creepy doll movies.” Set for release on May 19, 2017, we’re told that the film’s protagonist is going to be a nun who is worried that her orphans are becoming prey to an evil entity. Could this nun tie into the story of The Conjuring 2 and its forthcoming The Nun spinoff?

And what about a third Conjuring? Being that it’s close to topping $100 million worldwide, I think it’s safe to assume a third is quickly going into development.