Warner has released a new Batman: Arkham Origins Blackgate trailer.
Largely made up of comic book style animated cutscenes but offering a few glimpses of gameplay, it sees Batman headed to Blackgate Prison, where the entire staff is being held hostage following what looks like a botched escape attempt.
Announced in April, Blackgate is in development at Armature, a studio founded by several leads behind the Metroid Prime trilogy.
The Arkham series will make its handheld debut on October 25, which is also the Batman Arkham Origins release date.
Serving as a 2.5-D "companion game" to the console and PC title, Blackgate will allow players to "continue the storyline of Origins and discover more details of the Dark Knight's past", according to publisher Warner.
Armature Studios has said that both the 3DS and Vita versions of Blackgate will be powered by a modified version of the Bluepoint Engine used to create PlayStation All-Stars Battle Royale. The game will be the same on both platforms, except for higher-res assets on Vita and 3D options on 3DS.