Black Panther: Wakanda Forever has the potential to showcase every hidden Marvel superhero group within the MCU. While moviegoers anticipate seeing characters such as the X-Men, Namor, and Doctor Doom appear in the MCU in the future, there's a possibility that the people of Wakanda are already aware of their existence. For example, recent rumors have suggested that Namor and his underwater kingdom, Atlantis, are expected to make their on-screen debut in Black Panther: Wakanda Forever.
Wakanda was first mentioned in Avengers: Age of Ultron before making its official on-screen debut in Black Panther, two years after T'Challa's MCU debut in Captain America: Civil War. The country of Wakanda is unlike anywhere else in the world — home to flying cars and magnetic trains that power the entire city, making it the most technologically advanced nation on Earth. This is due to a copious amount of Vibranium that Wakanda is built on top of. However, prior to the end of Black Panther, civilians on Earth were led to believe that Wakanda was like any other country, a clever disguise that kept them hidden for centuries.
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Through Wakanda's technological advancements, it allows the country to serve as the best conduit for revealing hidden groups in the MCU. While their advantages could reveal other groups first, such as the X-Men, the introduction of Atlantis and Namor makes the most sense here. Wakanda and Atlantis have a rich history that stretches back across Marvel comics. The two nations have been in an on-and-off conflict with each other for years, with their initial union being rooted in the fact that both are hidden, technologically advanced countries.
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