Recorded at the Denver Comic-Con (June 13-15 2015), Kevin Conroy has talked to GrooveyTV about his Batman voice work and briefly touches upon Arkham Knight.
At around the 5 minute mark, he starts to chat about the game and lets slip that the possible release date for Arkham Knight is in January 2015. Not only that, but he suggests that the game had an initial internal target release of January 2014!
Kevin Conroy has been a reliable source for news in the past, so it’s quite likely that this is accurate.
Just after Christmas, huh? That should give plenty of people a chance to grab that elusive next-gen console!