Arrow, Flash, Supergirl and Legends crossover introduces its aliens

Alien invaders the Dominators are introduced in the trailer for the upcoming CW crossover

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Ahead of the mammoth CW crossover taking place across the casts of Arrow, The Flash, Supergirl and Legends Of Tomorrow, this teaser gives us a hint at exactly what to expect.

In addition to showing us some of the additons to the cast (including Deathstroke), we also get our first look at the alien invaders the Dominators, who Barry Allen accurately surmises “look like something out of World War Z“. Clearly a lot’s going down.

Among the confirmed attendees are the Green Arrow (Stephen Amell), The Flash (Grant Gustin), Supergirl (Melissa Benoist), Ray Palmer (Brandon Routh), White Canary (Caity Lotz), Black Canary (Katie Cassidy), Vixen (Maisie Richardson-Sellers), Citizen Steel (Nick Zano), Heat Wave (Dominic Purcell), John Diggle (David Ramsey), Felicity Smoak (Emily Bett Rickards) and Cisco Ramon (Carlos Valdes).

The four-part Arrow, The Flash, Supergirl and Legends Of Tomorrow crossover will air on Sky1 later in the year. For all the latest TV news, pick up the new issue of SciFiNow.