This week’s DC Comics show crossover on The CW kicks into high gear with The Flash tonight, and many might be wondering how the shows’ producers landed upon using the alien Dominators from DC’s Invasion! crossover as the threat that the heroes unite to defeat.
Speaking to press yesterday, Arrow and DC’s Legends of Tomorrow Executive Producer Marc Guggenheim discussed the genesis of the idea.
“It was Greg [Berlanti]’s idea to do the Dominators,” Guggenheim told the room. “I don’t want to speak for Greg, but I think the way it came out was we all collectively wanted the superheroes to face an external threat. And by external, I don’t mean extraterrestrial, I mean not a Big Bad from one of the shows; rather, a threat that came from outside of the shows. Greg just walked in one day and was like, ‘Let’s do Invasion!‘ I think we both had the exact same twin reactions: that’s totally awesome and oh my God, how the hell are we going to do that?” he recalled.

The Dominators do not have their robes that were worn in the original comics – visual effects-wise, that would be very time consuming – but the finished product does look very cool, which audiences will see tonight on The Flash.
You can see some photos from the crossover below. If you’d like to read the original Invasion! comic book series, you can find it here.