Twenty-five years ago, the three shrieking witches of “Hocus Pocus” flew across the big screen and, at least for a time, promptly out of everyone’s periphery. Resurrected from the dead 300 years after they were hanged, the Sanderson sisters — Bette Midler, Sarah Jessica Parker and Kathy Najimy — set out on a mission to suck the life out of children on Halloween night so they could be young again. But for all its wackiness, the July 1993 movie seemed to be stuck in a kind of Halloween-flick purgatory: too campy for a horror film, too creepy for a family film.