Batman: Arkham Asylum - 10 Coolest Easter Eggs, Secrets And References Explained

9. The Injustice Gang Strikes Again

One of the best locations for easter eggs in Arkham Asylum is Harley Quinn's old office. Of course, Quinn herself had once been a psychologist at the facility before she fell for the Joker, and her infatuation with the Clown Prince is clear for all to see once you enter.

Also cool to note is that the various tapes relating to Harley in Asylum serve as a neat adaptation of Paul Dini and Bruce Timm's Mad Love comic, which told the character's origin. The comic was adapted into an episode of The New Batman Adventures, which means Arleen Sorkin (the voice behind Harley Quinn) has technically starred in two adaptations of that particular story.

For all that the Harley room offers loads of cool insight into her origins - including her famous jester hat - there's another secret in the room that instantly made the Arkhamverse feel SO much bigger than it initially seemed. Take a look at the various newspaper printouts that adorn Quinn's wall, and you can spot a couple of references to the Injustice Gang, the second most famous DC supervillain team (the first being the Legion of Doom, duh).

Rocksteady would amp up their Justice League-related teases in both Arkham City and Knight, but only time will tell if they'll be the stars of the studio's next project...