The mutant son of a human sea captain and a prince of the mythical undersea kingdom of Atlantis, Namor possesses the super-strength and aquatic abilities of the Homo mermanus race, as well as the mutant ability of flight, along with other superhuman powers.
Through the years, he has been portrayed as an antihero alternately from a good-natured but short-fused superhero, or a hostile invader seeking vengeance for perceived wrongs that misguided surface-dwellers committed against his kingdom. The first known comic book antihero, the Sub-Mariner has remained a historically important and relatively popular Marvel character.
That’s a prediction and not a confirmation. But Namor the Sub-mariner, like Magneto, is an anti-hero, does good things when he wants to, and does bad actions when he has to. He has fought alongside and against the Avengers and Defenders as well as Fantastic Four and X-Men.
He’s Marvel’s first mutant as far as publication goes but not the oldest mutant within the Marvel universe. Much like Aquaman, he is an Atlantean-human hybrid and King of Atlantis but unlike Aquaman, he has the ability to fly. The only difference is, they’re not within the same universe (Aquaman is DC’s superhero) until Marvel/DC crossover pits them together.
His more prominent team is being part of The Illuminati. The Illuminati is a secret group of the strongest and smartest in the Marvel Universe, comprised of Iron Man, Professor X, Namor himself, Mr. Fantastic, Doctor Strange, and Black Bolt.
That’s a supergroup that no one wants to go up against unless you have a team of gods or Celestials. It’ll be interesting to see how Namor the villain takes on the protagonists of Doctor Panther 2.