Every February I try to watch as many franchise Horror films as I can, up to twenty eight. I call it Franchise February.
The rules are pretty loose. Just watch anything that you consider a Horror sequel, or that falls under a Horror franchise; e.g. Frankenstein, Dracula, Universal Monsters, Hammer Films, John Carpenter's "Apocalypse Trilogy," Lovecraft adaptations, movies with Jeffery Combs in them, etc. Anything you can think of. Try to watch at least twenty eight, or as many as you can manage, it's meant to be fun so it's up to you.
Make a Letterboxd list with your franchise picks and post the link in the comments. When you log a movie as watched, tag it with Franchise February. If you're feeling really ambitious, write a review to let everyone know what you thought. That's it, good luck!