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