JSA All Stars #17

History has gone awry, and only one member of the JSA All-Stars can put it right: The Prince! Who's that, you say? He's not a member of the JSA All-Stars? That's what they thought, too! He claims his father's archnemesis has altered the past to prevent him from ever being born . . . but how can he prove it to the All-Stars? And what is his ultimate goal?