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