Denis Villeneuve’sDune: Part Twowon deserved popular and critical acclaim, but – for all the sequel’s success – a subtle change from the book’s story proved that Villeneuve’s version of the story must come to an end after the next installment. In many ways,Dune: Part OneandDune: Part Twohave been faithful retellings of Frank Herbert’s magnum opus. The novel’s message of the dangers of blind faith was masterfully delivered, alongside impressive visual spectacle. And yet, while many features remained the same in the two movies, some story details were necessarily altered.

One of thebiggest differences betweenDunethe novel andDunethe two-part cinematic experience concerns characterization. While many of the same figures feature in both versions of the story, the ways they are presented creates a radically different impression. The best example of this isPaul Atreides' sister, Alia. While she plays an active role in the novel – killing Baron Harkonnen in the climactic fight –she is an unborn presence in the movie, save for a brief cameo in a dream sequence. Although the movie’s treatment of Alia makes sense, it also inadvertently proves whyDune: Part Threewill inevitably end Villeneueve’s franchise.

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Cutting Alia Out Of Dune: Part Two Creates A Precedent For The Rest Of The Franchise

It Suggests Other Characters Like Her Will Be Treated In The Same Way

BeforeDune: Part Two’s release, Alia Atreides was understandably considered the sequel’s most problematic character. According to the book,Alia is gifted with all the abilities of a fully-fledged Bene Gesserit as soon as she is born– a direct result ofLady Jessica drinking the Water of Lifewhile pregnant. This means that she is essentially an adult trapped inside a child’s body – a difficult thing to portray on film, as demonstrated by the failure to fully realize the character in David Lynch’s flawed 1984Duneadaptation.

Given the character’s complex nature, it is unsurprising that Villeneuve chose to avoid the problems she poses entirely by condensing the story’s timeframe and keeping Alia in utero. As a result,she plays an extremely limited role inDune: Part Two’s story– communicating with Jessica and Paul behind the scenes, but not doing anything as dramatic as stabbing the baron. This decision makes the movie’s story much more easily digestible, exorcising one of its more complex plot points. However, it is also a tacit acknowledgment that Alia, and characters like her, are incompatible with the kind of story Villeneuve wants to tell.

Cover Art for Dune Messiah with Paul Atreides in golden armor

Leto And Ghanima Atreides Are Even More Problematic Than Alia

Villeneuve Has Already Suggested He’ll Ignore Their Story

Considering Alia’s minimal role inDune, the consequences of her absence forPart Twoare not too dramatic. However, other characters in later chapters in theDunestory are not so easily ignored. Specifically,Paul and Chani’s children, Leto and Ghanima, present future Villeneuve movies with a problem that – if Alia’s treatment inDune: Part Twois anything to go by – will prove insurmountable.

Like Alia, Leto and Ghanima are born with supernatural maturity and Bene Gesserit powers – behaving just like adults when they are only children. In Frank Herbert’s third novel,Children of Dune, this sees the pair behave in ways that would be unthinkable for a normal child –presenting exactly the same set of problems as Alia did forDune: Part Two. InDune, Alia’s somewhat peripheral role meant she could be removed from the story. However, this is impossible for Leto and Ghanima.

Timothee Chalamet as Paul Atreides and Florence Pugh as Princess Irulan

In his treatment of Alia, Villeneuve has already proven that he doesn’t think these child characters are conducive to good storytelling…

The two children are the pivotal players inChildren of Dune’s story – going directly up against Alia as she succumbs to the influence of her dead grandfather, Vladimir Harkonnen. As a result, anyChildren of Duneadaptation would have to feature them prominently. In his treatment of Alia, Villeneuve has already proven that he doesn’t think these child characters are conducive to good storytelling, suggesting that – whatever the merits of its narrative –Childrenof Dunedoes not make sense for Villeneuve to adapt. As a result, it seems inevitable that the third film (presumably adapted fromDune Messiah) is where the director’s version will end.

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Dune Messiah Is Still A Great Place To End The Story

It Completes Paul’s Journey

Such is the power of Frank Herbert’s fictional universe that theDuneseries has expanded to include over 40 books – most of which have been written by Herbert’s son, Brian, and collaborator Kevin J. Anderson. Even considering the original six novels written by Herbert himself, a comprehensive adaptation of thecompleteDunestoryis impractical. With this context in mind, an adaptation ofDune Messiahis perhaps the most natural place to end Villeneuve’s movie trilogy.

Dune Messiahrepresents the climax of Paul Atreides' story…

Even though the story continues withChildren of Dune,Dune Messiahrepresents the climax of Paul Atreides' story. Having deposed the emperor and taken his holy war to the stars,Messiahshows Paul struggling with threats to his reign and personal hardship– balancing a plot to remove him from power and the fragility of his family’s rule with the knowledge that becoming a father will kill Chani. It ends with a blind Paul, having tried his best to plot the optimum path forward for humanity, wandering into the desert never to be seen again.

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The poetry of this moment and its rich symbolism is the ideal way for Villeneuve to end his contemplative take on the story. Both previous movies have centered on Paul’s transformation as a protagonist, so it makes sense for the final installment to bring his story to a close. Any future installments would perhaps inevitably feel unnecessary and more like a reboot than a continuation. Even though characters like Leto and Ghanima are at odds with the way Villeneuve wants to tell his story, it may actually be for the best that hisDune: Part Twosequel (if it ever happens) is the movie series' final installment.