The nation"s power rests on its sole possession of a metal called vibranium. (Two films into the series, and I still don"t understand what"s so special about vibranium, but never mind.) The trouble is that Americans have discovered another lode of vibranium at the bottom of the Atlantic Ocean. But when they investigate, their vessel is stormed by a regiment of mysterious merpeople: this attack is the film"s most thrilling sequence, an eerie set piece straight from an alien invasion horror movie.  not the only futuristic hidden nation in the world. There is also the undersea Mesoamerican kingdom of Talokan, ruled by the pointy-eared Namor (Tenoch Huerta). And he blames Wakanda for bringing American forces too close to his country for comfort.