If Denis Villeneuve stays true to the source material, Dune 3 will end with the tragic fall of Paul Atreides. In Dune Messiah, he faces the consequences of his own rule: a jihad is waged on his orders, billions of people die, and the cult around him becomes uncontrollable.
Prophetic vision turns into a curse, he sees all paths, but cannot change fate. Moreover, as a result of a conspiracy of enemies, Paul goes blind, but thanks to his gift, he continues to "see" the world.
However, when Chani gives birth to twins, Leto II and Ghanima , she dies, and Paul loses the ability to see into the future. Deprived of vision and crushed by loss, he chooses the path of the Fremen prophets: he goes into the desert to disappear into the sands. Thus the legend of Muad'Dib collapses, but his legacy remains, children who will change the Universe.
