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