Matt Donnelly Senior Film WriterSony Pictures Animation is developing a new movie about a pack of female K-Pop stars who slay evil spirits in between gigs.“K-Pop: Demon Hunters” is underway at the Oscar-winning studio behind “Spider-Man: Into the Spiderverse,” from directors Maggie Kang and Chris Appelhans.Kang, whose credits include “The Lego Ninjago Movie,” is mounting the project as an homage to her Korean pride and the wildly popular K-Pop music she grew up with.