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