[4] There’s really no way to make a good sequel to Poltergeist and retain any sense of dignity in the doing. But even if you go into Poltergeist II: The Other Side knowing it’s one of the most unnecessary sequels ever made, you’ll probably still find yourself disappointed. The Freeling family (JoBeth Williams, Craig T. Nelson, Heather O’Rourke, and Oliver Robins) are back, living with …