A peaceful day at Gotham City Park is interrupted by Mr. Freeze, who begins freezing civilians. He is stopped by Batman and Robin, the latter of whom was in a hurry. At Star City, Icicle Jr. is wreaking havoc on a suspension bridge only to be knocked out by Green Arrow and Speedy, who dismisses the villain because "today's the day". Meanwhile, Pearl Harbor is under attack by Killer Frost, who is also defeated Aquaman and Aqualad. Aquaman ask if Aqualad he is excited, to which he says yes because "today's the day". At Central City, The Flash and Kid Flash stop a robbery by Captain Cold. Flash tries to calm his nephew, who's excited because "today's the day". At Washington, the heroes arrive at the Hall of Justice, on the day the sidekicks finally are fully inducted into the Justice League a