"Crisis On Earth-X" Crossover Begins In New 'Supergirl' Promo

The CW has released a new promo for "Crisis on Earth-X," next week's four-show crossover event between Supergirl, Arrow, The Flash, and DC's Legends of Tomorrow. You can check it out above.

The newest promo focuses on the event's superheroes suiting up, in preparation to fight storm troopers and evil villains from Earth-X.

The promo is arguably the most cinematic of what's been released so far, giving plenty of badass shots of the crossover's 20+ heroes in action. This includes a massive shot of all of the heroes walking together, as well as a new look at Citizen Cold, Earth-X's version of Leonard Snart (Wentworth Miller).

The crossover, which is more of a continuous "movie-like" experience than the somewhat more episodic "Invasion!" crossover from last year, centers on a group of invaders from Earth-X, a previously-unknown world in the multiverse where Nazis won World War II.

Along with the villains of that world -- doppelgangers of Harrison Wells, Oliver Queen, and Kara Zor-El, among others -- the audience will meet some of its heroes, most notably The Ray and Citizen Cold.

"Crisis on Earth-X" is a four-hour event that will air on November 27 and 28 beginning at 8 p.m. and running for two hours each day; Supergirl (8 p.m. Monday), The Flash (8 p.m. Tuesday) and Legends of Tomorrow (9 p.m. Tuesday) will remain in their normal time slots but Arrow will move from Thursday to a 9 p.m. Monday placement for the week.