Sequels that will probably never be made
Cinematical has a great list of seven sequels that should be made, but probably never will. I have to say I agree with most of them. I would love to see a new Alien movie, the next Adams' Hitchhiker novel, and a sequel to Heathers (although I hear Mean Girls was a heavily inspired film that I need to see).
I would add Lost Boys and Goonies (which I already have scripted in my head - Columbus give me a call!)