Before the script was re-written, Kristen McKay (Liv Tyler) from the first film was going to return for only for the opening scene, where she would be killed.
This film was announced back in 2009.
There's a scene in the movie where Luke puts down a pistol on top of a book. The title of the book was "A Stranger is Watching."
The Man In The Mask is the only killer in the film to not have any lines of dialogue.
The director admittedly doesn't like slasher movies or home invasion movies.