The Magician’s Nephew Book vs. Movie: What Greta Gerwig’s Narnia Adaptation Changes

By Ahaqir Ishaq

Greta Gerwig’s Narnia: The Magician’s Nephew finally has a trailer, giving readers their first substantial look at how C. S. Lewis’s origin story is being translated to the screen.

But a trailer is only the beginning of a book-versus-movie comparison. It can reveal casting, imagery and the way a film is being presented without establishing which scenes have been cut, whether an ending has changed or how faithfully the finished story follows its source.

For now, the most useful comparison separates three things: confirmed adaptation choices, details revealed in the trailer, and questions that remain open until release.

Spoiler note: This article discusses the novel’s premise and selected later plot points. It does not reveal an unconfirmed movie ending.

What Has Been Confirmed About the Movie?

Netflix released the first trailer on October 13, 2026. The film is scheduled to open widely in theaters and IMAX on February 12, 2027, following IMAX sneak previews beginning February 10. Its Netflix debut is April 2, 2027.

Gerwig writes and directs the adaptation, which Netflix describes as the first screen adaptation of Lewis’s 1955 novel. Readers can watch the official trailer on Netflix Tudum.

For the broader release and casting background, see our guide to Greta Gerwig’s The Magician’s Nephew movie.

The Book vs. Movie Comparison So Far

The setting shift comes from reporting on Gerwig’s earlier Empire interview, rather than a date explicitly established by the trailer. The Playlist’s account of that interview distinguishes the postwar setting and Bowie-inspired design from the novel’s earlier period.

1. Starting With Narnia’s Creation Changes the Audience’s Introduction

The Magician’s Nephew follows Digory Kirke and Polly Plummer as magical rings take them between worlds. Their travels involve the ruined world of Charn, Queen Jadis and the birth of Narnia.

Beginning here changes what newcomers discover first. Instead of encountering an established world under the White Witch’s rule, they enter a story about how that world begins.

This is an adaptation strategy, rather than a departure from the plot of The Magician’s Nephew. The movie is using the origin story as its opening chapter.

For me, that creates an appealing opportunity: audiences can experience Narnia as something unfamiliar and unfinished. The challenge will be making its creation emotionally meaningful for viewers who have no attachment to the later adventures.

2. The 1950s Setting Raises a Timeline Question

Moving the London story into postwar Britain is a substantive change in historical setting. It potentially affects the clothing, streets, household atmosphere and cultural references surrounding the children.

The larger question concerns Digory’s connection to later Narnia stories. In the books, he eventually becomes the older Professor Kirke associated with the wardrobe.

How will the new adaptation connect those stages of his life? The trailer does not answer that question. It would be premature to claim Gerwig has removed the connection or settled on a particular replacement timeline.

This is one of the clearest details to revisit when the film arrives: does the new period simply refresh the opening adventure, or does it reshape the chronology of subsequent adaptations?

3. Aslan’s Presentation Is Different, but His Gender Has Not Been Established as Changed

Meryl Streep’s casting is confirmed. According to AP’s reporting from the trailer presentation, Aslan appears as a cosmic outline and roars without speaking in the preview.

That gives us a glimpse of the presentation, but little basis for evaluating the complete performance.

A woman providing Aslan’s voice does not by itself establish that the character has been rewritten as female. Claims about the movie’s pronouns or characterization need evidence from the film or a clear official statement.

My biggest question is how the performance balances authority with tenderness. A striking design can introduce Aslan, but the children’s encounters with him will determine whether he feels like more than a magnificent visual effect.

4. The Rock Music Has a Connection to the Book’s Creation Story

The trailer’s “Stairway to Heaven” accompaniment gives the preview a distinct musical identity. However, using a song in promotional footage does not guarantee it appears in the finished movie.

Nor does it establish that the adaptation is a conventional musical.

Music already has a foundation in Lewis’s story: Aslan brings Narnia to life through song. In Netflix’s official film announcement, Gerwig identifies that concept as a lasting inspiration. Netflix also confirms an original score by Mark Ronson and Andrew Wyatt.

The interesting comparison will be how the film turns that literary idea into sound and movement. Does the sequence invite us to experience creation alongside the children? Does it give wonder enough room to build? Those questions matter more to me than whether the imagery matches every reader’s mental picture.

5. Digory’s Personal Stakes Will Be an Important Test

Digory’s concern for his seriously ill mother gives the novel an emotional center. Later, his encounter with Jadis at the garden tests how he responds when temptation touches that concern.

That is book background, not a description of confirmed movie scenes.

For a screen adaptation, the challenge is allowing the personal story enough space amid the journeys and spectacle. I would look for whether Digory’s choices feel understandable, whether Polly remains a meaningful partner, and whether the consequences emerge through character rather than explanation.

The trailer cannot settle those questions. They are expectations drawn from the source material.

What We Still Cannot Call a Confirmed Movie Change

A scene missing from a trailer may still appear in the film. A familiar character receiving little screen time in the preview may still have a substantial role.

There is not yet sufficient evidence here to claim that Gerwig has changed the ending, removed the garden episode, rewritten the wardrobe’s origin or substantially reduced Polly’s importance.

Likewise, a trailer’s editing order should not be treated as the movie’s scene order. Promotional footage is designed to introduce and entice; it is not a complete account of the screenplay.

Should You Read The Magician’s Nephew Before Watching?

If your goal is to compare this adaptation with its source, The Magician’s Nephew is the book to read. You do not need to finish all seven novels first.

Reading it beforehand will make it easier to distinguish a new visual interpretation from a genuine change in plot or characterization. For a broader recommendation, our review of The Chronicles of Narnia considers what makes the series worth revisiting.

Want to read the source novel? Find The Magician’s Nephew on Amazon.

Affiliate disclosure to place before the live purchase link: As an Amazon Associate, I earn from qualifying purchases.

The first trailer gives readers plenty to discuss. The historical setting and creative presentation already invite comparison, while the central questions about character, pacing and the ending await the finished film.

The detail I will be watching most closely is whether Gerwig makes Narnia’s birth feel both enormous and personal.

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