One Piece Film: God Valley Is Canon — and It Could Finally Expose the Biggest Secret of the Void Century

One Piece Film: God Valley Is Canon — and It Could Finally Expose the Biggest Secret of the Void Century

One Piece just rewrote its own history. At One Piece Day 2026, Eiichiro Oda’s team announced not one but two new theatrical films — and one of them is unlike anything the franchise has ever done. One Piece Film: God Valley, set for Summer 2027, will be the first canon movie in the series’ entire 27-year cinematic history. And if you’ve been following the manga’s Final Saga closely, you already know why this is massive: God Valley isn’t just another flashback. It’s the key to understanding everything — the Void Century, the true nature of the World Government, and the reason Imu sits on the Empty Throne.

For decades, fans have debated what really happened at God Valley. Now, with the Elbaph Arc pulling back the curtain on Imu’s powers and the founding of the World Government, the timing of this movie feels deliberate. Here’s why Film: God Valley might be the most important One Piece story ever told — and what it could finally reveal.

What We Know About One Piece Film: God Valley

Announced during the One Piece Day 2026 celebrations alongside Film: Baad (expected in 2029), God Valley has a release window of Summer 2027. A teaser trailer is already available on One Piece’s official YouTube channel, and while details remain sparse, the implications are enormous.

Unlike every previous One Piece film — including the record-breaking Film: Red — God Valley will directly adapt manga canon. Specifically, it will cover the God Valley flashback from the Elbaph Arc, depicting the events surrounding Rocks D. Xebec’s fateful assault on the island 38 years ago. This isn’t a side story or a spin-off adventure. This is the actual history that shaped the world of One Piece.

As ScreenRant noted, the canon movie approach follows the enormous success of Demon Slayer: Infinity Castle, Chainsaw Man: Reze Arc, and Jujutsu Kaisen 0 — films that proved audiences are hungry for canonical anime storytelling on the big screen. One Piece, despite being the best-selling manga of all time, was the glaring outlier. Not anymore.

Why God Valley Is the Key to the Void Century

Let’s talk about what actually happened at God Valley — and why it matters more than almost any event in One Piece history.

Thirty-eight years before the present storyline, the island of God Valley was the site of a three-way conflict between Rocks D. Xebec’s crew, a young Monkey D. Garp and Edward Newgate (Whitebeard), and the forces of the World Government. The Rocks Pirates, featuring future legends like Kaido, Big Mom, and Shiki, attacked God Valley in what appears to have been a deliberate provocation — one that drew out both the Marines and, crucially, the attention of Imu.

But here’s the part that’s always been shrouded in mystery: why God Valley? What was on that island that was worth Rocks D. Xebec risking everything? The manga has hinted that God Valley was connected to the native competition — a cruel game organized by the Celestial Dragons involving the indigenous people of the island. But beneath that surface-level cruelty lies something far more significant.

With the Elbaph Arc now revealing that Imu possesses 19 weapons belonging to the founding rulers of the World Government, and with Imu’s terrifying combat abilities on full display, God Valley becomes the perfect lens through which to examine the connection between the Void Century’s aftermath and the modern World Government. Rocks D. Xebec may have known things — things about Imu, about the True History, about the Ancient Kingdom — that made him the most dangerous man in the world.

The Rocks D. Xebec Connection

Rocks D. Xebec remains one of One Piece’s greatest enigmas. We know he was captain of the most dangerous pirate crew in history. We know his ambition was so terrifying that the World Government erased him from public memory. And we know that his dying words or legacy somehow shaped both Blackbeard and the trajectory of the entire series.

In the manga, Blackbeard’s obsession with God Valley and the Rocks Pirates’ legacy has been a recurring theme. His ship, the Saber of Xebec, his tactics, and even his strategic alliances all echo the methods of the man he clearly reveres. If Film: God Valley reveals what Rocks D. Xebec was truly after at God Valley, it could simultaneously explain Blackbeard’s endgame — and why Imu considers him such a threat.

Here’s the theory that’s been circulating in the fan community: Rocks D. Xebec wasn’t just raiding God Valley for power or treasure. He was trying to reach something — or someone — connected to the Ancient Kingdom’s legacy. The Celestial Dragons’ “native hunt” may have been a cover for something far darker: a ritual or experiment tied to the weapons Imu now wields. If Rocks discovered this secret, it would explain why the World Government went to such extreme lengths to erase him — and why Garp, despite his legendary status, has always been cagey about what really happened that day.

How This Connects to the Elbaph Arc

The timing of this announcement is no coincidence. The manga’s Elbaph Arc has already done the heavy lifting of establishing Imu as a genuine physical threat — not just a shadowy puppet master, but a warrior wielding the 19 swords of the founding rulers through a mysterious ability called Omen. We’ve seen Imu’s four-horned Devil Fruit form. We’ve seen the power of Domi Reversi. And we’ve seen that the Void Century’s biggest lies are unraveling in real time.

Film: God Valley will serve as a direct continuation of the Elbaph Arc’s anime season, filling in the visual and emotional gaps that the manga’s flashback panels could only hint at. Imagine seeing Rocks D. Xebec in full animated glory, clashing with the forces of the World Government on an island where the laws of the world don’t apply. Imagine the anime’s adaptation of God Valley’s first truly canonical battle — a story that’s been teased for over 25 years finally getting the blockbuster treatment it deserves.

This also raises a fascinating question about Blackbeard’s role in the final saga. If Rocks D. Xebec’s ambitions at God Valley are finally made clear, does Blackbeard’s own plan suddenly make more sense? Is he trying to complete what Rocks started — and if so, what does that mean for Luffy, for Imu, and for the world?

For more on how Blackbeard’s Devil Fruit theories connect to Imu, check out our previous deep dive on Blackbeard’s inevitable collision with Imu. And if you’re curious about how Imu’s powers tie into the Sun God Nika mythology, we covered why Imu called himself “God” out loud — a moment that recontextualized the entire Devil Fruit hierarchy.

What This Means for the Franchise’s Future

With a canon movie in 2027 and Film: Baad following in 2029, One Piece is clearly building toward a cinematic crescendo that mirrors the manga’s Final Saga. The two-movie approach — one canon, one likely non-canon — gives Oda’s team the flexibility to dive deep into critical lore while still delivering the crowd-pleasing spectacle fans expect.

More importantly, the God Valley movie signals that Toei Animation and Oda are finally ready to treat One Piece’s history with the same reverence that Demon Slayer gave to Infinity Castle. This isn’t just fan service. This is a statement: the Void Century is no longer off-limits.

For fans who’ve been waiting since Chapter 1 to learn the truth about the world — and for everyone who’s been captivated by the Elbaph Arc’s revelations about Imu, the Ancient Kingdom, and the price of freedom — Film: God Valley might be the moment everything clicks into place.

The question is: will we get answers, or will Oda give us just enough to make us crave more? If history is any indication, it’ll be both — and we’ll love every second of it.

What Do You Think?

Here’s the big question: What was Rocks D. Xebec really after at God Valley? Was he searching for a weapon? A Poneglyph? Or was he trying to confront Imu directly — and failing? Drop your theories in the comments below, because this is going to be one of the most debated topics in the fandom until Summer 2027.

One Piece Film: God Valley hits theaters in Summer 2027. The Elbaph Arc continues in the manga weekly.