A Justice League Villain Is Hiding In The Batman: Arkham Knight Batgirl DLC

If you read Andrew Reiner’s impressions yesterday, you know that the Batman:Arkham Knight Batgirl DLC doesn't really fire on all cylinders. However, a new discovery gives us a reason to return to it.

YouTube user Dribbiz found a potent hint that points toward the Justice League. Found hidden in the DLC is a vent that leads to a small room. 

Inside is a tank housing the alien lifeform, Starro, a Justice League villain. Is this just a nod to the broader DC Universe, or is WB Games hinting at its next game now that Rocksteady is leaving the Arkham series behind? Or, since the DLC was developed by WB Montreal, perhaps that studio is at the helm of a broader DC game.