Justice League plot
During a United Nations meeting, a global disarmament agreement is reached, entrusting the protection of the world to Superman. Shortly after the disarmament, a powerful alien race attacks Earth from Mars. A team of seven superheroes is quickly assembled: Superman, Batman, Flash, the Martian J'onn, the galactic heroes Green Lantern and Hawkgirl, and Wonder Woman, who has left her island to save humanity. Batman discovers the invaders' weakness: sunlight destroys them. The group defeats the invaders by destroying the shadow dome surrounding their base. Nevertheless, the risk of their return remains, so the seven form a group to protect Earth.