Apparently, there is a new Batman Arkham Origins game in the works and will be announced by Rocksteady Studios at E3 2013.
According to the French site Gameblog, the game will not be a continuation of the Arkham series. Instead it will be a prequel inspired by the Silver Age of comics, which ran from the mid 1950’s to around 1970.
If true then a number of Justice League members like Superman and Green Lantern will be featuring an appearance.
Batman Arkham Origins is reported to release later this year for current and next-gen platforms.