The upcoming Netflix reboot ofThe Chronicles of Narniais now in production, andnew details from the film’s set has indicated a major change for the popular franchise.Greta Gerwig’sNarniais set to adaptThe Magician’s Nephew, a prequel toThe Lion, the Witch, and the Wardrobethat was released in 1955.

As is always the case with a reboot of a popular franchise or new adaptation of a classic novel series, there is a lot of curiosity about how Gerwig’sNarniamovies will compare to what’s come before. She’s delayed some of the inevitable comparisons by tacklingThe Magician’s Nephewfirst, since the previous movie franchise never adapted it.

Aslan the lion sits with Edmund on a hill in The Chronicles of Narnia

While that means some may be less familiar with C.S. Lewis' prequel book, there are several important details that it contains that have a direct connection to futureNarniastories. After all, this film will introduce a young White Witch, played by Emma Mackey, and set up the wider world of Narnia for future installments to explore.

That’s why how faithful it is to adapting the source material is already making waves.The new film looks set to make some compelling changes to the story of its world,which could have enormous ramifications for any sequels that might follow.

The Chronicles of Narnia: The Lion, the Witch and the Wardrobe (2005) Movie Poster

Greta Gerwig Is Seemingly Overhauling Narnia’s Franchise Timeline

While the novelThe Magician’s Nephewwas set in 1900,the upcoming film looks to have changed this period setting to the 1950s.The set design and costumes that have been seen in new set photos fromWhat’s on Netflixseem to confirm this, as well as previously leaked casting calls and details from various outlets.

This setting has not been officially confirmed, but it does seem likely to be the case for the upcoming film, as seen in theNarniaset photos. This might complicate things significantly for the franchise. Notably,the stories in theNarniabooks were largely set in the 1940s,during World War II.

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In order to craft a prequel to the series,C.S. Lewis decided to write a story about Professor Digory Kirke and his involvement in the beginnings of Narnia.With the professor being in his fifties inThe Lion, the Witch and the Wardrobe, Lewis had to setThe Magician’s Nephewin 1900.

IfThe Magician’s Nephewfilm adaptation instead takes place in the 1950s, as has been suggested by these details, thenthis sets off the entire timeline of the franchise.If further adaptations draw from the same novels and stories, that will mean that aThe Lion, the Witch and the Wardrobesequel would need to be set in the 1990s.

Moving the setting of this larger story into more contemporary times is an interesting move. It will surely inform the characters, style, and outlook of the films. While Narnian time moves at a different pace, the characters in the films and their dynamics with one another must remain at least similar.

Still, full details of what Gerwig is doing withThe Chronicles of Narniaremain to be seen. She has been vague about her plans for the adaptation, and it is certainly possible that general details about the world are instead being used to tell original stories. However the film turns out, it is sure to be fascinating.