A trailer for today's launch of DC Universe Online, Sony Online Entertainment's MMORPG for the PC and PS3, in which players battle for - and against - their favorite DC Comics heroes and villains, including Batman, Superman, Wonder Woman and The Joker. For the very first time, players and fans will be able to enter this fabled world as an active force for good or evil. The action and drama will play out in such well-known locations such as Gotham City and Metropolis.