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