Back in May, as production was under way on The Dark Tower, author Stephen King tweeted out an interesting photo, which featured an item fans of his novel series recognized as the Horn of Eld. The author had also recently teased that the movie will begin with the very first line of his book, but then the plot will shift to the middle of the story. These revelations, along with other details about the adaptation, have many fans convinced that The Dark Tower is not actually an adaptation of the novels, but a sequel to them. That theory just got a very big boost with the emergence of new photos from the set.

The new set photos were taken from the New York City set yesterday, featuring Idris Elba alongside his young co-star Tom Taylor, who plays Jake Chambers in this adaptation. While the photos, which surfaced from Just Jared, don't offer too many details about the scene they're shooting, one particular image reveals that Idris Elba's Roland Deschain actually has the Horn of Eld on his person. While we don't know for sure, this photo could in fact confirm the theory that The Dark Tower will serve as a sequel to Stephen King's original book series.

Many fans were puzzled when Abbey Lee was cast as Tirana, a minor character who only appears in the final novel. If this Horn of Eld theory is true, then it would make sense for Tirana to be cast. Stephen King's final novel ends as the first novel began, with Roland Deschain chasing the Man in Black (Matthew McConaughey), but this time, he holds the Horn of Eld, which was long thought to be missing. While the Horn of Eld's presence certainly seems to hint that this project is a sequel to the books, and not a straight-up adaptation, those details have yet to be confirmed.

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It's also worth noting that one of the other characters, Michael Barbieri's Timmy, doesn't have a huge role in the books, as a friend of Tom Taylor's character Jake Chambers. Both author Stephen King and director Nikolaj Arcel have confirmed that this movie won't be following the first book exactly, but they also didn't confirm that this movie is a sequel to the books either. It isn't known how much longer production will be under way, but hopefully we'll have more details soon.

The Dark Tower adaptation will bring Stephen King's series of seven novels to life, which follows Roland Deschain, a.k.a. The Gunslinger, who sets off on a journey to find The Dark Tower, rumored to be a portal to other worlds. Nikolaj Arcell is directing from a script by Akiva Goldsman and Jeff Pinkner, with Ron Howard and Brian Grazer producing. Take a look at these new set photos, and visit Just Jared to check out the photo of the Horn of Eld.