au where the bats manage to stay urban legends, sure other heroes know of them, but they help largely from the shadows, they aren't put on display and they're hardly known at All outside of the strange circle of gotham's goons

that changes when duke thomas stares batman down and says on no uncertain terms that he's working day shift

the signal is Gotham's first confirmed superhero, and he wears a bat on his chest

social media goes Wild fighting over whether the Batman existed all along or if someone finally got the tech and powers to make the bat (or a bat) Real

suddenly the world of superheros feels a lot more real to the citizens of Gotham who got used to horrible disasters being either ignored or neatly cleaned away from the public eye, now there's a guy getting thrown through windows and helping grannies cross the street and the war between gotham and metropolis gets even more cut throat