Synopsis

The wedding of Barry and Iris draws the heroes together, but celebration turns to conflict when villains from Earth-X launch an attack on the ceremony. United, the superheroes rally with assistance from allies like Citizen Cold, The Ray, Felicity Smoak, Iris West, and Alex Danvers, facing their most dangerous adversaries yet. Earth’s greatest champions – Green Arrow, Supergirl, The Flash, and White Canary – lead their respective teams into battle to safeguard the world. The crossover event be