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