Villain for the four-part CW superhero crossover revealed DC Entertainment and The CW have announced that the four-part CW superhero crossover of Supergirl, The Flash, Arrow, and DC’s Legends of Tomorrow will feature an all-new villain to menace their heroes in the form of The Dominators. “This year, for our mega ‘Arrowverse’ crossover, we’re taking inspiration from a DC crossover from the late 1980s known as Invasion!, which featured an alien race called the Dominators, who’d previously vexed the Legion of Super-Heroes,” Arrow and DC’s Legends of Tomorrow executive producer Marc Guggenheim said. “We’re using cutting edge prosthetics and computer effects to achieve a feature film-quality look which is faithful to Invasion!