Before Marvel Studios can even take the stage to pull back the curtain on Avengers: Doomsday at San Diego Comic-Con later this month, tla LEGI leak may have just revealed the arrival of a group of villains who have been rumored to be on their way to the MCU for years.
The information, which comes from trusted brick-insider Carterbricks04, the official LEGO rollout for the December 18, 2026 blockbuster has inadvertently detailed the MCU debut of a legendary villainous team—and an evil, reality-warping superhero variant that fans have been begging to see on screen.
The leaks outline two separate, massive playsets that pinpoint exactly where the Russo Brothers are taking the narrative. Here is the full structural breakdown of what just slipped onto the wire.
Set 1: “Sentinel Battle” — The Fox X-Mansion Siege
The first set configuration heavily validates the leaked production footage that trickled out of the UK sets earlier this year. Titled “Sentinel Battle,” the box description outlines a massive, war-torn mutant sanctuary sequence:
- The Build: Features a full Sentinel replica alongside a detached, giant downed Sentinel head.
- The Minifigures: The set functions as a massive multiversal crossover block, packaging Robert Downey Jr.’s Doctor Doom alongside Thor, Mister Fantastic, and a legacy Fox mutant frontline consisting of Magneto, Mystique, and Nightcrawler.
Set 2: “Dark Avengers Quinjet” — The Evil Steve Rogers Variant
This is where the leak morphs from a standard action sequence into a full-blown narrative spoiler. The second major retail set is officially titled the “Dark Avengers Quinjet.”
- The Dark Avengers Debut: While we’ve all been fooled by toy leaks in the past, the info teases a variant-driven iteration of the Dark Avengers will take on the Multiverse’s Mightiest Heroes at some point in the film.
- The Secret Empire Callout: The single most explosive piece of the leak is the accompanying minifigure roster, which formally lists HYDRA Captain America. While analysts note that a standard translation error could mean the ship simply belongs to the MCU’s mainline New Avengers featuring Wyatt Russell’s U.S. Agent, it’s hardly far-fetched to believe that the Russos would use a nightmarish version of the Avengers in a Multiverse film. The leak heavily points to Chris Evans returning to pull off a live-action adaptation of the infamous Secret Empire comic run—playing a ruthless, fascistic Variant of Steve Rogers. Disney loves to sell toys and would make a small fortune on Dark Avengers action figures.
Along with the action sets, LEGO is officially launching a premium Doctor Doom Bust set (76345), granting fans their absolute closest look yet at the exact facial sculpt and mask structure Downey Jr. will utilize in the film.
If this leak holds true when the first official trailer drops at SDCC, Avengers: Doomsday isn’t just going to be a battle over cosmic territory—it’s going to be a devastating, emotional deconstruction of the entire Marvel legacy.
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