http://tvline.com/2018/05/17/arrow-flash-supergirl-legends-crossover-2018-batwoman-gotham/
i'm sure Batman is out of town...if he exists.
This year’s Arrowverse crossover will be battier than ever, as Green Arrow, The Flash, Supergirl and the Legends of Tomorrow fight alongside… Batwoman.
“We will be doing another crossover event this fall on The CW [and] we will be introducing a new character. We will be fighting alongside Batwoman,” Arrow star Stephen Amell shared on Thursday at the network’s Upfronts event.
In turn, as one might surmise, “We’re adding the city of Gotham into the Arrowverse,” added CW president Mark Pedowitz.
i'm sure Batman is out of town...if he exists.