Starro arrives on Earth while battling the Martian Manhunter, landing in Metropolis. Superman assists in the battle and the Flash arrives to see how he can help. Superman sends him to recruit Batman and Wonder Woman while he holds the creature off. Learning of Starro's appearance on Earth, Hal returns to Earth, arriving after the other heroes have assembled. The heroes defeat Starro in the end and the six heroes officially form the Justice League. Darkseid is then revealed to be observing the events occurring on Earth.
