As someone who has read Frank Herbert's Dune three times, I want to break down the major changes Villeneuve made and whether they serve the story.
Change 1: Chani's role is massively expanded In the book, Chani is loyal to Paul without much resistance. In the film, Zendaya's Chani is openly skeptical of Paul's messiah complex and actively pushes back against the Lisan al Gaib prophecy. This is the best change. It makes the ending devastating instead of triumphant. Herbert intended the reader to be uncomfortable with Paul's rise — the movie makes that discomfort unavoidable through Chani's face.
Change 2: Princess Irulan gets more screen time Florence Pugh's Irulan is a political player in the film. In the book, she barely appears until the ending. The movie seeds her throughout, making the political marriage feel like a strategic move rather than a plot convenience.
Change 3: The Fremen are divided on Paul In Herbert's novel, the southern Fremen accept Paul more uniformly. Villeneuve splits them into believers and skeptics, with the northern Fremen resisting the prophecy. This creates real dramatic tension and maps onto how religious movements actually fracture communities.
Change 4: Feyd-Rautha's introduction Austin Butler's gladiator arena scene is original to the film. The black-and-white Giedi Prime sequence is stunning. Herbert describes Feyd's cruelty; Villeneuve shows it in a way that makes your skin crawl.
The verdict: Villeneuve understood something crucial — adapting Dune faithfully means adapting its THEMES, not just its plot. The book is a warning about charismatic leaders. The movie makes you feel that warning.
Sources: Frank Herbert, Dune (1965), Chilton Books. Denis Villeneuve interviews with Empire Magazine and The New York Times.
The Chani change is the single best adaptation decision in modern cinema. Herbert wrote Dune as a cautionary tale but readers kept missing the point because Chani supported Paul. Villeneuve made it impossible to miss.