Batman / The Flash: The Button - Deluxe Edition #[nn]

In "The Button Part 1," Saturn Girl’s eerie prediction at Arkham Asylum sets an unsettling tone as Batman grapples with a mysterious smiley face button from the Speed Force. As he confronts visions of a darker past, The Flash is summoned—only for Professor Zoom to strike first, seizing the button before collapsing dead in a sudden, unexplained turn.

In "The Button Part Two," Barry Allen follows a trail of mysterious radiation linked to both Professor Zoom’s death and the enigmatic smiley face button that appeared in the Batcave after Wally West’s return. With Batman injured and the timeline unraveling, the two heroes race through time using the Cosmic Treadmill to uncover the truth behind the signal—before it’s too late.

In "The Button Part 3," Batman and the Flash journey into the Flashpoint universe via the Cosmic Treadmill, where Bruce Wayne encounters Thomas Wayne—the Batman of that reality. As they face a sudden assault by Amazons and Atlanteans, Barry works to repair the treadmill while Thomas makes a choice that changes everything. Their escape leads them into the timestream, where they confront a dying Professor Zoom, still holding the mysterious Button.

In "The Button Part Four," Barry Allen and Bruce Wayne confront the aftermath of their journey through the time stream, witnessing the mysterious death of Professor Zoom at the hands of a god-like entity. A voice from the past—Jay Garrick—calls out to Barry, lost in time like the original Wally West, but before Barry can reach him, he’s torn away by an unseen force. As the two heroes grapple with what they’ve seen, a strange blue hand silently claims the button left behind by Zoom, leaving the fate of the timeline hanging in uncertainty.