CW's Four-Show DC Crossover Gets a Full-Length Trailer

"We must exterminate your kind before the scourge of your planet becomes the scourge of ours."

These are the first words spoken by the Dominators, mind-controlling aliens who have grown so concerned about Earth’s metahuman threat that they have decided to stomp it out before it can reach the stars. The latest full-length trailer for The CW's crossover between "Supergirl," "The Flash," "Arrow" and "DC's Legends of Tomorrow" finally gives voice to the invading alien species, and -- like Wally says -- they most certainly did not come in peace.

RELATED: Flash Breaks the (Alien) News to Green Arrow & More in Invasion! Promo

The trailer incorporates many of the scenes seen in earlier promos, but extends them into full scenes. In it, we see Barry "The Flash" Allen discover a crashed Dominator ship, before he goes to gather all of the heroes he knows to fight this new and formidable threat. As it turns out, Lyla Michaels -- and likely ARGUS, as well -- coined the name "Dominators" for their unwelcome visitors, who have brought a massive army to Earth.

One shot shows Citizen Steel overlooking a battlefield as the Dominators destroy a battalion of armed soldiers. Judging by the setting and the costuming, it almost looks as though this scene takes place in the past, which wouldn't be uncharacteristic for the time-travelling Legends.

RELATED: Arrowverse Crossover Will Reveal New Information About Flash’s Future

The trailer also offers a look into what appears to be a Dominator slave ship. A few of our heroes seem trapped here, and all are garbed in the same scrub-like uniform. Green Arrow, Speedy, the Atom, White Canary and John "Spartan" Diggle appear to be among these prisoners.

Another scene shows a good handful of our heroes -- the Atom, Firestorm, Citizen Steel, the Flash, Supergirl, Green Arrow, Vixen, White Canary, Heatwave and Spartan -- standing on a stage with what appears to be some government representative. The hanger around them is decked out with American flags, which makes it appear to be the same place where Barry and Cisco pull Kara through to their earth.

RELATED: The Arrowverse’s Heroes Welcome Supergirl in New Crossover Clip

Starring Melissa Benoist as the Girl of Steel, “Supergirl” airs Mondays at 8 pm ET/PT on The CW. The network is also home to Grant Gustin as the Scarlet Speedster in “The Flash,” airing Tuesdays at 8 pm ET/PT, Stephen Amell as the Emerald Archer in “Arrow,” airing Wednesdays at 8 pm ET/PT and Arthur Darvill, Brandon Routh and Caity Lotz in “DC’s Legends of Tomorrow,” airing Thursdays at 8 pm ET/PT.

flash crisis
The Flash: New Promo Reveals CRISIS Looming, Barry Losing Hope

More in TV