People are always talking about “jumping the shark,” making fun of tv shows or movie sequels for trying to come up with new gimmicks to mix it up so they don’t just keep repeating themselves. In a horror series you’re gonna start shaking things up pretty quick. In HALLOWEEN they tried getting rid of Michael Meyers by part 3, though they brought him back for part 4. In ELM STREET 3 they added this idea of a group of kids who can dream together and all have different super powers in their dreams, and people liked that so they stuck with it. For FRIDAY THE 13th 4 they added a little kid (Corey Feldman), not to mention they changed who the killer was in part 2. The Chucky series turned into absurdist comedy by part 4.
All of these series have time passing, they might have a back-to-back story like HALLOWEEN and HALLOWEEN 2 but for the most part when you get to a sequel it’s been a year or more and a new group of people is here to have a run in with Freddy or whoever. The SAW series is very unusual in that this is part 4 and they are still dealing with the same killing spree, same characters introduced in previous sequels and still connecting everything to those events, and the timeline even overlaps with the last one. (read the rest of this shit…)