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