A new report reveals the reason the upcoming spinoff show Dune: Prophecy did not have a trailer to accompany the release of Dune: Part Two. Currently expected to arrive on Max in the fall this year, Dune: Prophecy will serve as a prequel series to Denis Villeneuve's critically acclaimed movie adaptations of Frank Hebert’s novels. Set thousands of years before the rise of Paul Atreides, the upcoming spinoff show will chart the origins of the mysterious and influential order known as the Bene Gesserit.

https://screenrant.com/dune-prophecy-no-trailer-part-2-why-filming-update/