Avengers: Endgame Is Hiding a Major Marvel Superhero

Is the Sub-Mariner about the make a splash in the Marvel Cinematic Universe? Some fans believe that a blink-and-you’ll-miss-it Avengers: Endgame moment is a clue that Namor will be a major part of the MCU’s future. On a brand new episode of Explainiac, Dan Casey dives deep into Namor’s comic book history and breaks down the theory about how Marvel’s first mutant could enter the Marvel Cinematic Universe.