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, and the Teen Titans, as well as antagonists such as the Joker, Lex Luthor, Catwoman, Darkseid, Black Manta, Deathstroke, Sinestro, Professor Zoom/Reverse-Flash, and Ra’s al Ghul. The company has also published non-DC Universe-related material, including Watchmen, V for Vendetta and many titles under their alternative imprints Vertigo and America’s Best Comics. The initials “DC” came from the company’s popular series Detective Comics, which featured Batman’s debut and subsequently became part of the company’s name. Originally in Manhattan at 432 Fourth Avenue, the DC Comics offices have been located at 480 and later 575 Lexington Avenue; 909 Third Avenue; 75 Rockefeller Plaza; 666 Fifth Avenue; and 1325 Avenue of the Americas. DC has its headquarters at 1700 Broadway, Midtown Manhattan, New York City, but it was announced in October 2013 that DC Entertainment would relocate its headquarters from New York to Burbank, California in 2015. Random House distributes DC Comics’ books to the bookstore market, while Diamond Comic Distributors supplies the comics shop specialty market. DC Comics and its major, longtime competitor Marvel Comics (owned by The Walt Disney Company, Time Warner’s main rival, since 2009) together shared over 80% of the American comic book market in 2008.