Heather O’Rourke won hearts in the first three Poltergeist movies, with the last one released posthumously. Heather O’Rourke: She Was Here will debut in 2023, over 30 years after her death.

Leading the slate is “She Was Here,” a documentary that delves into the life of beloved child actress Heather O’Rourke, famed for her role in the “Poltergeist” and known for the line ...