10 000 years before Paul Atreides joined the Fremen to lead an uprising on Arrakis to take down House Harkonnen, two sisters (Valya and Tula Harkonnen) create the mysterious all-female order called the Bene Gesserit. In Dune Prophecy, the siblings combat forces that threaten the future of humankind.
The first episode was just streamed and seems to be really well done and interesting story.
For those already invested in Dune, this series feels like a meaningful expansion, a chance to delve deeper into the nuances of Herbert's universe. If you're new, this is a worthy entry point, though you might have to work a little harder to keep up.
I personally like it.