You could have had Freddy show up, or Michael, or Jason ... or all of them.
shareWould be nice, but WB would have to get permission to use the characters since they don't own the movie rights to the characters. Well, I don't think they own the movie rights to any of them. I know the main three have been bouncing between which company owns the movie rights to them.
shareNo, because then it would be a mash-up movie.
Cultural references are always a touchy thing as movies are meant to take place in their own world as much as possible.
Like movies with the president, I think it works better when they don't hire someone to play the current president. A fictional president always works better.
In 1988 I was scared of Predator.
King only invented Pennywise and his ability to "awaken" fears as a device to work into one story all the famous monsters like vampires, Frankenstein, werewolves and mummies. So it's weird that original purpose kind of got forgotten now.