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