Both games will lead off the holiday season, arriving on October 25th with Warner Brothers Montreal handling developer duties for the main game with Blackgate developed by Texas-based Armature Studio. They worked on the Metal gear HD Vita versions and are staffed by some of the Metroid Prime team More news to come very soon I guess.
Game Informer says "Blackgate is a completely separate experience that takes place after the events of Arkham Origins. Armature Studio is developing the 2.5-D Metroid-style exploration action game. Industry followers will recognize Armature Studio as the company founded by several of the leads from the Metroid Prime trilogy." Armature was also developing a Mega Man reboot, which has since been canned by Capcom.