A long-absent President Ross' Red Hulk transformation and the Serpent Society's introduction, the Leader's long overdue return, and the world's acknowledgment of Tiamut's corpse lying in the ocean. Captain America: Brave New World could be an essential installment not only within Phase 5, but also in the context of the Multiverse Saga as a whole.

Just a couple of weeks before Captain America: Brave New World's release, Marvel Studios began unveiling more details about the movie. New Red Hulk footage, a clearer glimpse at the Leader's Gamma-mutated appearance, and new references to Tiamut's corpse have all been included in trailers and spots. More importantly, Captain America: Brave New World's confirmation of Adamantium's introduction holds special significance considering the return of a powerful MCU villain.

Captain America: Brave New World Introduces The World’s Most Powerful Substance

Marvel Finally Introduces Adamantium In The MCU's Main Timeline

Captain America: Brave New World's trailers confirm that Tiamut's corpse is an island made of “Adamantium… more indestructible than Vibranium.” Naturally, world governments and private entities have set their sights on Adamantium due to its unique properties. Considering Wakanda became one of the most advanced nations in the world due to its unlimited access to Vibranium, Adamantium could do wonders for any country's military, economy, and technological development. At the same time, efforts to acquire Adamantium could easily lead to vicious wars.

Adamantium is known to be a rare, artificially-made substance in the comics and in Fox's X-Men movies

Adamantium's introduction in Captain America: Brave New World could be the first step towards the debut of a new Wolverine in the MCU, and it could set up incredibly powerful weapons that could be used by heroes and villains alike. Adamantium is known to be a rare, artificially-made substance in the comics and in Fox's X-Men movies, but the MCU apparently made a huge change to it by introducing it as the prime material Tiamut and possibly other Celestials are made of.

Ultron May Be Aspiring To Create An Indestructible Body With Adamantium

Ultron May Return In Vision Quest Solely To Fulfill His Original Goal

Ultron coats himself in molten vibranium or adamantium in Avengers Age of Ultron
Custom image by Nicolas Ayala

Captain America: Brave New World introduces Adamantium towards the end of Phase 5, fourteen years after Captain America: The First Avenger introduced Vibranium. Meanwhile, Ultron is set to return in Vision Quest in 2026, eleven years after his apparent death in Avengers: Age of Ultron. Ultron's return only one year after Adamantium's introduction might not be a coincidence. After all, Ultron's goal in Avengers: Age of Ultron was to create the perfect body with smuggled Vibranium. If Ultron saved a back-up copy of his consciousness somewhere on the internet, all he has to do is activate himself when news of Adamantium's discovery is made public.

White Vision activates in WandaVision and What If..._ season 3
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It was difficult for Ultron to acquire Vibranium and create his indestructible body in Avengers: Age of Ultron because Wakanda's existence was still a secret back in 2015. Had Vibranium been as readily available then as it is now, or if Adamantium had been accessible back then, Ultron could have defeated the Avengers, and Vision likely wouldn't exist. Now, Ultron could evasily acquire Adamantium from Tiamut. A bigger question is how exactly Ultron will make his way back to the physical world in Vision Quest and what vessel he will adopt as his first body when he does it.

Ultron’s Adamantium Body Could Make Him A More Interesting Villain Than He Was In Phase 2

Ultron Could Become Truly Indestructible If He Gets His Hands On Adamantium

Vision and Ultron in the MCU's Avengers Age of Ultron
Custom Image by Kai Young

Ultron's defeat at the end of Avengers: Age of Ultron was rather underwhelming due to his apparently definitive death at the time. Vision simply destroyed the last Ultron Sentry with a blast from the Mind Stone. Ultron's confirmed return in Vision Quest suggests he actually didn't die in 2015, and now the only way to eliminate him might involve a different approach. After acquiring Adamantium in Captain America: Brave New World, neither White Vision nor any other hero could destroy the villain's physical body, even if they wanted to.

Ultron's indestructible nature could entail a more cerebral conflict

Ultron's power relies on his intangibility. The Avengers can destroy Ultron's main body, but the only way to get rid of him definitely is to wipe him off the internet and any network that could house a back-up of his consciousness and code. Therefore, defeating a fully indestructible, Adamantium-laden Ultron would be a matter of wits, not of sheer power. Instead of another action-fueled battle like Avengers: Age of Ultron's, Ultron's indestructible nature could entail a more cerebral conflict. Fortunately, Vision and White Vision's philosophical match in WandaVision's finale provided just that, and Vision Quest could follow suit.

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