It's probably only scratching the surface of the secrets that Gotham is hiding but someone has already found three Superman Easter Eggs in Batman Arkham Knight. The below video from Arekkz Gaming isn't spoilery, unless you don't want to see inside the GCPD or want to check your own answering machine messages (do that), but this is definitely Superman's world too. It's enough to make you wonder what a Rocksteady Superman game would be like. Now that's some DLC I'd exchange my Bat-shaped soul for.
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