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