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As anticipation grows for Marvel Studios’ massive 2026 crossover film Avengers: Doomsday, new rumors suggest the movie could revisit one of the Marvel Cinematic Universe’s most iconic locations—Doctor Strange’s Sanctum Sanctorum in New York City.

While plot details for Avengers: Doomsday remain tightly under wraps, insider buzz and early production whispers are starting to shape what might become one of the most pivotal Marvel movies of all time.

Sanctum Sanctorum Rumored to Return in Avengers: Doomsday According to reliable scooper Alex Perez via The Cosmic Circus, one of the key sets being used in the production of Avengers: Doomsday is none other than Doctor Strange’s magical headquarters in Greenwich Village:

“Only that it’s going to be in London and that they’ve already prepared a few sets. I’ve heard the Sanctum Sanctorum was a set piece being used. But that’s all I got.”

This revelation hints that Stephen Strange’s home base could once again serve as a major backdrop for multiversal chaos. Production on the film has reportedly begun in London as of April 2025, and if the Sanctum Sanctorum has indeed been rebuilt as a set, it likely means big things for the Sorcerer Supreme—and the fate of the Multiverse.

The Sanctum Sanctorum’s Legacy in the MCU

First introduced in Doctor Strange (2016), the Sanctum Sanctorum is one of Earth’s three mystical strongholds, alongside sister sanctums in Hong Kong and London. Located on Bleecker Street in New York, this mysterious building has become a frequent setting across several MCU blockbusters, including:

Avengers: Infinity War
Spider-Man: No Way Home
Thor: Ragnarok
Doctor Strange in the Multiverse of Madness

Even in films not centered on the sorcerer, the Sanctum has been used to ground stories in Marvel’s supernatural realm. Its return in Avengers: Doomsday may signal that magic and multiversal forces will play a much larger role than previously expected.

Is Doctor Strange Actually Returning in Doomsday?

Benedict Cumberbatch’s Doctor Strange was last seen venturing into the Dark Dimension with Clea (Charlize Theron) at the end of Multiverse of Madness. Since then, Strange has been missing from the main MCU timeline, leaving Wong (Benedict Wong) to handle both duties as Sorcerer Supreme and master of the Sanctum.

In early 2025, Cumberbatch initially denied involvement in Avengers: Doomsday. However, he later confirmed his return, despite his name being conspicuously absent from the official cast list revealed in March.

If the Sanctum Sanctorum is indeed featured in the film, and with set construction already underway, it’s highly likely that Doctor Strange will be back in action, possibly bringing new powers or knowledge from the Dark Dimension.

Why the Sanctum Matters in Avengers: Doomsday
With the Multiverse Saga accelerating toward a cataclysmic clash, the inclusion of Doctor Strange’s sanctum suggests that magical defense and reality-bending plotlines will remain core elements of the narrative. Here’s why it matters:

1. Central Hub for Multiverse TravelThe Sanctum is often used as a staging point for heroes venturing between realities, as seen in No Way Home. Its return may indicate major multiversal travel, team-ups, or even incursions.

2. Reunion with Clea
Fans are still waiting to learn more about Clea’s mission and her role in repairing the Multiverse. Could she and Strange be warning the Avengers of the rise of Doctor Doom?

3. Potential Midnight Sons Tease
The Sanctum’s reappearance might tie into rumors about the supernatural team Midnight Sons, which could include Moon Knight, Blade, and Ghost Rider. It would be a logical place for such a group to unite.

What’s Next for Avengers: Doomsday?

Set to hit theaters on May 1, 2026, Avengers: Doomsday is directed by Joe and Anthony Russo and features a staggering ensemble cast—27 confirmed characters, including returning favorites like Thor (Chris Hemsworth), Sam Wilson (Anthony Mackie), and even Robert Downey Jr. as Victor Von Doom, the film’s rumored main villain.

Marvel Studios is clearly pulling out all the stops for this installment of the MCU Phase 6, and if early reports are accurate, fans can expect a rich blend of magic, multiverse, and legacy heroes.