Batman: Arkham Origins Blackgate (Game) - Stills

According to Super Hero Hype:

The game will take place after the events of "Arkham Origins" and will see Batman going to Blackgate Prison in the wake of a riot that has broken out. It will be a side-scrolling game that features some of the same weapons and gadgets but won't rely on an "experience point" system.

The game will be released for the 3DS and PS Vita.