Batman: Arkham Origins Blackgate

Batman: Arkham Origins Blackgate is an upcoming handheld spin-off to Batman: Arkham Origins. Due alongside its console-counterpart, Batman: Arkham Origins Blackgate adapts the proven Rocksteady formula into a portable setting. Armature Studio is developing the 2.5-D Metroid-style exploration action game.

Summary
Batman: Arkham Origins Blackgate is a completely separate experience that takes place after the events of Arkham Origins.