Renny Harlin simultaneously filmed all three films of this trilogy. The producer explained that the lead star would film scenes for the first film in the morning and scenes for the second in the afternoon, commuting to many different locations for filming several times a day.
According to Froy Gutierrez, filming of all three films took place in Fall of 2022 over a 52-day shoot.
The third film of a series and the first film of a new trilogy. All films of the trilogy are directed by Renny Harlin.
There have been several news articles before the release of 'Chapter One' stating that the Director intends to release a 'super-cut' of the three films spliced and edited together as a single film. If all films of the trilogy are about 90 to 100 minutes long (which is typical of most slasher/thriller productions.), then the 'super-cut' will be about 290 to 300 minutes long, making it potentially one of the longest horror films ever made.
The film's script was originally 280 pages long based off of notes and ideas which director Renny Harlin and producer Courtney Solomon juggled between each other. They then separated the screenplay into three parts which is now planned to be a trilogy of interlocked stories.