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