Do you want to compare Iron Fist with John Grey? Discover the powers, weakness & weapons of Iron Fist and John Grey from Iron Fist Biography and John Grey Biography. Find out all about Iron Fist and John Grey.# Check out how is Iron Fist unique and distinct from John Grey. Discover their love interest, sidekicks, family tree and the movies and games list in which Iron Fist and John Grey have appeared. Find out everything about them here!