With a third Dune film potentially on the way ... which ends with Paul’s disappearance. As his sister, Alia, rules the empire in his stead, Leto II and Ghanima grapple with the possibility ...
In accordance with Fremen custom, he walks into the desert and leaves his children in the care of his sister ... mother returns to Dune (Arrakis) to visit her grandchildren Leto II and Ghanima.