At D23 Expo, fans got a wicked greeting from “HOCUS POCUS 2” stars Bette Midler, Sarah Jessica Parker and Kathy Najimy, who appeared magically via video to surprise the room with a new trailer. It’s been 29 years since the 17th-century sisters have been resurrected and they are looking for revenge. It’s up to three high-school students (Whitney Peak, Belissa Escobedo, Lilia Buckingham) to stop the ravenous witches from wreaking a new kind of havoc before dawn on All Hallow’s Eve. Directed by Anne Fletcher and produced by Lynn Harris, “Hocus Pocus 2” also stars Sam Richardson, Tony Hale and Hannah Waddingham. It debuts exclusively on Disney+ Sept. 30.