It's a trending topic in the rumor mill currently, and various sources like Comic Book Movie and Bleeding Cool are reporting it.
Apparently, DC Comics is planning a major event/ crossover next year called "Trinity War", which is rumored to focus on a division and eventual battle between the publisher's big three icons, namely Superman, Batman, and Wonder Woman. It sounds very reminiscent of Marvel's own 2006 - 2007 crossover series "Civil War", which saw the hero community split and forced to choose a side over the passing of a Superhero Registration Act. The consequences of this event divided the Marvel Universe greatly and changed it for a number of years, and now the same may happen to the DC New 52 Universe with their upcoming 2013 crossover. Until official word comes from DC itself, consider this a rumor at best... But it definitely gets the blood pumping for fans who want to see a throwdown between the Trinity and their allies! For more on the story, visit Bleeding Cool and CBM!