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