Throughout six decades of storied X-Men comic book history, mutantkind’s superhero champions have faced off against countless enemies with genocidal aims for the homo-superior species. Somehow the first appearance of Jean Grey in the MCU isn’t the only consequential piece of mutant lore in Brand New Day. He deals with both situations by creating a genetic inhibitor, modeled after a similar device used by Bruce Banner to keep The Hulk under control. Mutant Inhibitor Collars, ExplainedBecause Peter’s invention is based on Bruce Banner’s own genetic inhibitor, he’ll also inevitably be tried at the Hague. This story invented the concept of the inhibitor collar, a piece of technology designed to suppress the powers of captured mutants.