Namor is similar to Killmonger in the regard that his primary motivation is relateable to a general audience. He’s looking out for the people of Atlantis, and unfortunately, the land-dwellers don’t always have the oceans’ best interest at heart in decision-making. Namor and his people suffer the effects of that, and eventually, the ruler has to step up and make a point. Unfortunately, he’s the type to level an entire city rather than condemn humanity’s actions in front of the U.N., so pissing off Namor can go south real quick.
Article source: https://www.cinemablend.com/news/2478275/should-marvel-introduce-namor-in-black-panther-2