Warner Bros. released a new Batman Arkham Knight trailer which looks at the playable Batgirl (Cassandra Cain) character as part of the season pass package. Batgirl: A Matter of Family can be purchased separately on July 21st for £5.79.
Season pass details:
The Batman: Arkham Knight Season Pass includes an exclusive Flashpoint Batman Skin and delivers regular new content for six months featuring new story missions, more Super-Villains invading Gotham City, new legendary Batmobiles, advanced challenge maps, alternative character skins, and new drivable race tracks.