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