Golosseum

Scientists discover a new material that renders people immune to all existing weapons. But these “peacemakers” instead transform world war into a martial-arts free-for-all! Rasputin plots with Russian President Putinov to control the global supply. Opposing them are the unstoppable Axe Bogan, a certain master in a jumpsuit from China, and a slew of other muscular heroes!

(Source: Kodansha USA)