The CW has revealed that the four-way crossover that will bring “Supergirl”, “The Flash”, “Arrow” and “DC’s Legends of Tomorrow” together, will be the result of an invasion by 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 Superheroes,” Arrow and Legends of Tomorrow EP Marc Guggenheim says. “We’re using cutting edge prosthetics and computer effects to achieve a feature film-quality look which is faithful to Invasion! artist Todd McFarlane’s interpretation of the characters.”
The Dominators will invade Arrow, The Flash, Supergirl, and DC’s Legends of Tomorrow on this season’s 4-way crossover event! pic.twitter.com/9oX6Uvs2Oe
— Supergirl (@TheCWSupergirl) September 29, 2016
Source: EW.com
I had some Invasion First Strike comics back in the day. If you look close, in the last panel of The Adventures of Superman #449, when Superman is addressing the assembled heroes, you can see Spiderman in the crowd.