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I think Hellbound: Hellraiser 2 to the obvious Hellraiser franchise.
Nightmare on Elm Street 2 to the NOES franchise.
The Final Chapter for F13.
Halloween 2 for Halloween (followed by four and five).
Total toss-away thread, just seems like there aren't many new discussions coming up.
And don't feel the need to stick only to these franchises, go on to Ginger Snaps or Tremors or Romero's Dead series, whatever...