When all of Earth’s superhero teams are disabled by a psychic attack, it falls to Green Arrow to track down the parties responsible.
What hi-jinks will ensue when Harley and Ivy cross paths with Betty and Veronica? Not a whole lot, actually, at least not yet.
Batman #21 sees Batman begin investigating that bloodied smiley face button, musing over its connection with the timeline disturbances. A connection, which is then barely touched on.