Alex Danvers: [walking into J'onn's hidden headquarters] You gotta tell us about this place.
Kara Danvers: Yeah!
J'onn J'onzz: Well, in the wake of the Crisis, Kara, Kal-El, Barry, Kate, we established a headquarters from which to fight crime.
Winn Schott: Oh, in the future they call it a Hall of Justice.
Kara Danvers: I like that.
J'onn J'onzz: I thought since LuthorCorp now owns the DEO, National City could use its own collective. A headquarters to keep this city safe. To work outside of corporate and government oversight.
Alex Danvers: Huh.
J'onn J'onzz: Whose interests might not always side with justice.
Alex Danvers: So, like S.T.A.R. Labs?
Kara Danvers: Or the Arrow bunker.
J'onn J'onzz: Place for my super friends to work, whenever they should need it.