IMPERIUS REX! Namor is imprisoned, serving out his sentence as the disgraced King of Atlantis! So when a new yet ancient threat arises from the sea, who better to leap into the fray than Marvel's First Family: the FANTASTIC FOUR! Writer FABIAN NICIEZA and artist CREEES LEE join forces for a GIANT-SIZE deep dive into some of Atlantis' most dangerous history…and the present that can scarcely hope to contain it! PLUS: Includes a reprinting of FANTASTIC FOUR #33, a classic issue from Stan Lee and Jack Kirby featuring betrayal, action and high drama - in the Atlantean style!