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