You think villains have a group chat or a system to warn others when something really bad happened to a hero and he now went rogue or something? Like
Two face: Everyone... The joker killed another Robin.
Every villain in the room:... WHAT?!
Caos strikes the room, the penguin is hyperventilating with a paper bag, Ivy is checking all the windows, scarecrown is fetal position in the corner having war flashbacks.
Two-face: OKAY EVERYONE STAY CALM, WE practice this, set the alarms and let's get the fuck out of this city.
Two-face: I don't know a year? Until he gets another one?
The Riddler: A YEAR? What about our business here?
Two-face: You want to deal with Batman right now? Be my guest, I'm getting the fuck out.
Strange: Oh my god I think he's at the rooftop!
Two-face: EVERYONE GET IN THE FUCKING CAR!