DC Comics, Inc. is an American comic book publisher. It is the publishing unit of DC Entertainment, a company of Warner Bros. Entertainment, which itself is owned by Time Warner. DC Comics is one of the largest and most successful companies operating in American comic books, and produces material featuring many well-known characters, including Superman, Batman, Wonder Woman, Green Lantern, the Flash, Aquaman, Cyborg, Shazam (formerly Captain Marvel), and Green Arrow. The fictional DC universe also features superhero teams such as the Justice League, Justice Society, Watchmen, and the Teen Titans, as well as antagonists such as the Joker, Lex Luthor, Catwoman, Darkseid, Black Manta, Deathstroke, Sinestro, and Professor Zoom/Reverse-Flash.