Batman: Arkham Knight tucks away a tiny Batgirl easter egg for observant players, but the Caped Crusader's gal pal gets an adventure of her own in Batgirl: A Matter of Family.
The upcoming Arkham Knight add-on pits Batgirl and Robin against the Joker. The Clown Prince of Crime is holed up at the Seagate Amusement Park with Commissioner Gordon -- friend of Batman and father to Batgirl's real-life persona, Barbara Gordon -- as his prisoner.
This prequel story is the first of several planned expansions for the recently released Batman game. It's out on July 14 for anyone that pre-purchased all of the add-ons with a Season Pass, and it'll be sold separately (for $6.99) starting on July 21, for PlayStation 4 and Xbox One. A PC version will follow "in the coming weeks."