Focus Features has released a teaser trailer announcement for the upcoming horror sequel "Insidious Chapter 3" starring Dermot Mulroney, Stefanie Scott, Lin Shaye, Angus Sampson, and Leigh Whannell.The film is written and directed by Leigh Whannell.In "Insidious Chapter 3," a twisted new tale of terror begins for a teenage girl and her family , predating the haunting of the Lambert family in the earlier movies and revealing more mysteries of the otherworldly realm The Further.