EJ Panaligan editor In the new trailer for “M3GAN,” an AI, childlike robot doll has a murderous taste for blood. The film comes from the esteemed horror production company Blumhouse, in close collaboration with horror maestro James Wan, who was notably behind the “Saw,” “Insidious” and “Conjuring” franchises. “M3GAN” stars Allison Williams as Gemma, a toy company roboticist who programs the artificial intelligence doll. Gemma tasks the doll with protecting her grieving niece Cady, played by Violet McGraw, who lost both of her parents in a car crash. While Cady and M3GAN hit it off initially, the doll’s brutal side takes over when Cady gets bullied by an insensitive boy. M3GAN seeks to protect her from physical harm. The trailer is soundtracked by Taylor Swift’s “It’s Nice to Have a Friend.”