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