The CW just released the full trailer of the anticipated "Crisis on Earth-X" crossover event to unite DC superheroes like The Flash, Supergirl, Arrow, Firestorm, Heat Wave, and more. The 2-night event will feature four 1-hour episodes.

The crossover event will commence with "Supergirl" on Nov. 28 at 8 p.m. EDT on The CW and, followed by "Arrow." The third part will be a "The Flash" episode and then concluded with "DC's Legends of Tomorrow," on Nov. 28.

The crossover special centers on the battle between the DC heroes and the villains originating from Earth-53 or Earth-X. Earth-X is an alternate universe where the Nazi regime won the World War II and are now invading earth.

The trailer starts with Barry Allen (Grant Gustin) and Iris West's (Candice Patton) wedding will all the superheroes in attendance including Supergirl (Melissa Benoist). Oliver Queen or Arrow (Stephen Amell) will serve as Allen's best man.

The matrimony is interrupted when an army of Nazi soldiers from Earth-X attack the church and results to an all-out fight. The heroes will also be facing evil versions of Supergirl, The Flash, and Green Arrow. The crossover special will also feature other villains like Prometheus-X, Red Tornado, and A.T.O.M Droid.

The trailer also shows an amazing lineup of superheroes including Captain Cold (Wentworth Miller), The Ray (Russell Tovey), Atom (Brandon Routh), Killer Frost (Danielle Panabaker), Mister Terrific (Echo Kellum), and others.

The first-look video also reveals that the DC heroes will be overpowered by the villains. There are no updates from The CW and the producers if there will be a surprise character for the side of the good guys or the bad guys.

The "Crisis on Earth-X" crossover event is also a collaboration among four directors. Directors Larry Teng ("Supergirl"), Dermott Downs ("The Flash"), James Bamford ("Arrow"), and Gregory Smith ("DC's Legends of Tomorrow") worked hand in hand.