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