Image Courtesy of Marvel Comics The X-Men are practically synonymous with the subspecies of humanity known as Homo Superior, aka mutants. And this makes sense: the X-Men are the primary advocates of human-mutant coexistence and fight for mutant rights in Marvel Comics. Over the years, the X-Men and their numerous offshoot groups have come to include hundreds of mutants, including […] The post 7 Powerful Mutant Heroes Who Never Became X-Men appeared first on ComicBook.com .