Stab 4

Stab 4 is the fourth installment of the fictional Stab film series. Unlike the first three films in the franchise, it follows a completely original story. Not much is known about the film's plot, though it serves as the first of a new Stab trilogy.

This comes after Sidney Prescott threatened to sue for using stories based on true events (possibly for a Stab remake originally set for the 10th anniversary). Despite being fictional, it is regarded as one of the better Stab sequels, according to Jenny Randall and what is implied by Richie Kirsch.

Stab 4, along with Stab 5, hasn't had the chance to show up in the saga, although Stab 6 has been previewed in Stab 7.

Scream 4 props
For the fourth film's props, the production team unveiled the idea that Gale wrote a fictional book to serve as the basis for the film, titled Knife of Doom.

The synopsis of the prop-book reads:

"It has been three years since the last killing spree orchestrated by the infamous Ghostface killer. Now that Sidney has defeated her past, it seems Woodsboro is finally at peace, but when a freak lightning storm occurs in the town where it all began, the buried remains of Ghostface come back to life to instill fear in the hearts of a new batch of victims. Now it's up to Ashley Prescott, Sidney's long-lost daughter to put an end to the madness once and for all."

However, it was not used on-screen, so it is unknown if this is the contents of the book itself that serve as the basis for Stab 4. In-universe dialogue indicate Gale's path to fiction-writing is also recent, which indicates the props are non-canon.

Trivia

 * In Scream 4, Jenny Randall stated that this is the first movie that does not follow Sidney Prescott's true life story, due to her almost suing Sunrise Studios. However, she still appears in some capacity, according to Scream 5.
 * This is the first Stab film not based on true events.
 * The movie poster can be seen at the Cinema Club located at Woodsboro High School in the fourth film.
 * The props department for Scream 4 's idea of the film, and/or Ghostface itself, is a spoof reference to Friday the 13th Part 2 (1981) and Halloween 4: The Return of Michael Myers (1988), the way Ashley is added, as a replacement main character.