The upcoming HBO Max series, "Dune Prophecy," is set to explore a period approximately 10,000 years before the events of the original Dune novels. The show, based on the prequels and extended universe novels, will likely focus on the initialization and early days of the Bene Gesserit Order. Early trailers and speculation suggest it will cover a fresh story, but may touch upon elements from existing books and films, such as possible flashbacks to younger characters, like Valhar Conan, and potential involvement of known characters like Desmond Hart. There's also potential for a glimpse of the thinking machines and the Ben Gesserit's mysterious powers. The series' timeline, the exact focus, and the portrayal of established characters remain uncertain, but the trailer has garnered significant excitement for its potential depth and scope.