As with Rocksteady's previous Arkhamverse games, there are plenty of hidden details throughout 's Metropolis. These details reference some of the many heroes and villains to inhabit the DC universe, expand upon the backstory for some characters, and even suggest plotlines for future chapters in the game's story.
[Warning: The following article contains major spoilers for Suicide Squad: Kill the Justice League]Rocksteady began to branch out into the wider DC universe — and its multiverse — for the first time in the series with, setting Task Force X's mission in Superman's home, Metropolis, rather than Gotham. Therefore, while there are still many Easter eggs from the previous Batman: Arkham titles, such as «The Batman Experience» that can be explored in Metropolis' museum, as well as trophies collected from the villains in those games in the Batcave, now incorporates even more DC character references from outside the Batman series in its Easter eggs.
A poster for a show by singer and entertainer Johnny Charisma can be found in 's open world. Arkhamverse fans will recognize Charisma as one of the people infected by Joker's blood in. Charisma was apprehended after trying to blow up Batman's base in Panessa Studios, but was soon killed by another Joker-infected patient, Henry Adams, suggesting this poster for his show in Metropolis is over five years old.
Metropolis was in the midst of a «Justice Day» celebration when Brainiac struck, and therefore, there are many posters displayed around the city celebrating the Justice League. When Task Force X is teleported to Earth 2, what's left of the decimated Metropolis is similar to that of their home dimension, with the Justice Day images still plastered on walls and billboards. There is one key difference, however, where some of the Justice League members shown are other characters who have donned the mantle. Whereas the Green Lantern of Earth 1 is John Stewart, Hal Jordan is the Green Lantern in Earth 2. Wally West is alsoRead more on screenrant.com