This is a far stretch, even by videogame industry standards, but it seems that one of the possible new names for the next Batman game to come out would be Arkham Universe, beside other possibilities such as Arkham Rises or Arkham Origins. This was all seen by the eagle-eyed fellows at Fusible, where they came upon the realization that the list of domains listed below:

arkhamuniverse.com (Arkham Universe)
batmanarkahmuniverse.com (Batman Arkham Universe)
batmanarkhamarises.com (Batman Arkham Arises)
batmanarkhambegins.com (Batman Arkham Begins)
batmanarkhamdarkknight.com (Batman Arkham Dark Knight)
batmanarkhamknight.com (Batman Arkham Knight)
batmanarkhamlegend.com (Batman Arkham Legend)
batmanarkhamlegends.com (Batman Arkham Legends)
batmanarkhamnight.com (Batman Arkham Night)
batmanarkhamorigins.com (Batman Arkham Origins)
batmanarkhamstories.com (Batman Arkham Stories)
darkknightarkham.com (Dark Knight Arkham)
dcarkhamuniverse.com (DC Arkham Universe)
dcarkhamverse.com (DC Arkhamverse)
thearkhamuniverse.com (The Arkham Universe)

All these domain names were all registered by MarkMonitor, who just happens to be affiliated with Warner Bros. Yes, I know it's a long stretch, but Arkham Universe would have a ring of consistency to it, as the scale of the game grows larger, although the jump from City to Universe may be a tad bit too much. Let the rumours begin.