Panthers, Hulks, and Ironhearts offers the first comprehensive study of how Marvel has reimagined what a superhero might look like in the twenty-first century. It examines how they have revitalized older characters like Black Panther and Luke Cage, while creating new ones like Latina superhero Miss America. Furthermore, it considers the mixed fan responses to Marvel's recasting of certain 'legacy heroes,' including a Pakistani-American Ms. Marvel, a Korean-American Hulk, and a whole rainbow of multiverse Spider-Men.