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