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