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