On Paradise Island wonder Woman is training with Mala, telling her of how much America has changed since the war over ten years earlier. She replies back saying that the island has changed, many Amazons no longer want Hippolyta in charge. The two of them stop training when they realize a huge creature, The Centre is approaching.
Back at Ferris Aircraft, while Hal is in a training simulator, it begins to shake and a green glow encircles it and it starts to fly. It takes him out into teh desert where he finds a crashed spaceship belonging to Abin Sur, the Green Lantern of Sector 2814. He tells him in his dying breath that he has been chosen to become the next Green Lantern of Sector 2814. He mentions that his ship was hit by massive amount of yellow energy, likely caused by Hal's ship exploding and that he was forced to crash land on Earth and send his ring out to find the next worthy man to become his replacement. He leaves his ring with Hal and warns him of the threat that The Centre poses to mankind before dying.
Hal meeting Abin Sur.
In the Batcave, Superman and Batman review the evidence gathered by J'onn and Superman meets Robin for the first time. Superman asks him why the change in his costume and why the boy, he replies that he set out to strike terror in the hearts of the guilty not the innocent. As they talk they hear Lois come on over the radio, reporting the attack of a giant pterodactyl at Cape Canaveral, Florida. Superman flies to Cape Canaveral an quickly takes out the creature. Right after Wonder Woman's invisible plane makes a crash landing, its cockpit smothered in blood along with Diana. Before losing consciousness she warns Superman of The Centre's arrival.
Faraday and J'onn are now shown to be friends, occasionally chess with one another. J'onn reveals that he decided to stay because of the upcoming battle with The Centre and that he telepathically linked his with him on the platform before his capture. He found that Faraday believes that one day humanity won't live in a world with fear and hate. Being able to find that within Faraday renews J'onn's hope in humanity and decides to participate in the upcoming battle against The Centre to save the Earth. Before leaving with Faraday to Cape Canaveral J'onn adopts a new friendlier look and becomes a superhero calling himself the Martian Manhunter.
The Centre then begins its attack on the east coast of Florida, finally revealing itself for the first time. The Centre is massive island like creature with an army of mutated dinosaurs on it's surface. The threat draws the world's heroes including The Flash (Who was convinced by Iris to come out of retirement), Adam Strange
, Green Arrow
, the Challengers of The Unknown, and The Blackhawk Squadron who clashed with the soldiers at the base. The clash was stopped by Superman who wants cooperation between both sides. Surprisingly Faraday agrees and seconds Superman's proposal along with J'onn, who feels that the government and heroes should work together for freedom. Superman then heads out to attack the Centre but is shockingly defeated in a second, leaving the other heroes and soldiers shocked.
The rest of the heroes and soldiers decide to band together, to fight the Centre in honor of Superman. Batman then interrupts a meeting between Faraday, J'onn, Will Magnus and the Challengers in order to present Ray Palmer, a scientist known for his work on matter reduction. One of the Challengers argue that it's a waste of time, the technology is too unreliable, causing everything it shrinks to become destabilized. Batman points out that that's the exact point, everything it shrinks becomes unstable, meaning his invention could be used against the Centre. Ace argues that no could get fast enough to go over the entire island with the machine, Batman points out that The Flash is fast enough. Their plan is to distract The Centre with an air attack on the outside and a small two man team comprised of Hal and Ace attacking inside while The Flash runs across The Centre.
Together Batman in the Batplane, Green Arrow in the Arrowplane, and Challengers of The Unknown lead the air assault but are soon outmatched until the Blackhawk Squadron intervenes, though Faraday and the ground forces are quickly outnumbered as well as they find themselves up against an army of mutated dinosaurs. J'onn is then overwhelmed by The Centre's immense telepathic abilities, Faraday then comes to his rescue but is captured by a dinosaur. As he is about be eaten Faraday grabs an entire belt of grenads, pulling off two and then pulling the pins before landing in the creature's mouth.
The shock of Faraday's death helps J'onn overcome The Centre's psychic attack and then he and Wonder Woman help turn the tides on the battle. Hal and Ace shoot their way into The Centre and once entering they find themselves in a bizarre psychedelic world, disorienting them at first. A thick red liquid then starts to secrete from the creature, jamming the controls of their planes. Right before his plane is about to explode Hal's ring activates, along with a message from The Guardians instructing him on the use of his ring.
As Ace is about to detonate his plane Hal rescues him, now dressed in a costume identical to the one worn by Abin Sur. The explosion gives the ground force enough time to send the Flash in. Racing across he reaches the Centre in a matter of seconds and leaps up onto it, circling around the entire thing before leaping off into th ocean. As The Centre begins to shrink it heads towards the coast, to take humanity with it.
Realizing the destruction that will cause Hal uses his ring on it, enveloping the creature with his energy and then hauling it into space to let it explode. As the entire world begins to celebrate Hal celebrates the achievement of his goal, finally being able to fly through space. Amidst the celebration comes Aquaman or Arthur of Atlantis as he is called along with Superman who he says has been calling for a woman named Lois for some time. The heroes gather together for a photo by Jimmy Olsen of the Daily Planet, making the front page.