Man Mountain Marko (Michael Marko) is a fictional supervillain appearing in American comic books published by Marvel Comics. Marko was and remains an affiliate of numerous organized-crime entities in the Marvel universe, including the Maggia. He was allied with Silvermane, Caesar Cicero, Eel I, and Nightshade. His most frequent enemies are Spider-Man, Power Man, Iron Fist, Thunderbolt, and Boomerang. He appears to have no relation to Cain Marko, seen in various Marvel titles as the Juggernaut, despite similarities in surname, physique and superpowers.