This story will mark Ruby Roses debut as Kate Kane, a.k.a. Batwoman. While Kate is Bruce Waynes cousin in the DC Universe, the Batman isnt expected to appear in this story or anywhere else in the Arrowverse any time soon. That said, Batman does exist in this world, and Oliver Queen called him out by name last season on Arrow. Although its extremely doubtful that Oliver knows about Bruce Waynes double life, and the Dark Knight probably wouldnt have appreciated that shout out.

If Batwoman goes to series next spring, then this story may also introduce some of her supporting cast and villains. But further details have yet to be announced.