Paranormal Activity: The Marked Ones is no spin-off. It's not a side story that ignores the previous films to go in its own direction. Not at all. This is 110% canon. It fits with the series perfectly and in my opinion could have easily been called Paranormal Activity 5 and no one would have complained. Hell, this should have been the Paranormal Activity 4 that we never got. If you're thinking you should skip this one and just wait for 5, think again as Paranormal Activity: The Marked Ones reaches an elevated height within the franchise by breaking some new ground... and then burying you alive and screaming in it.