Before the DC TV shows began airing, CW Chief Mark Pedowitz confirmed that there are plans of converting the storylines of not just Supergirl, Flash & Arrow but to include Legends of Tomorrow as well. He said that he has a tremendous amount of faith in CW universe and it will be the biggest crossover event ever. In fact, recently Stephen Amell shared a picture on his Instagram page which shows the boots of Flash, Green Arrow, Supergirl, Atom and White Canary, and he wrote: “Coming Soon”. Marc Guggenheim (the executive producer) said: “It’s going to be an external threat that will involve Supergirl coming over to the Flash, then Arrow and Legends of Tomorrow.” Greg Berlanti explained the scope of it and said: “You really re trying to run a single production across three different productions, but they run as three separate entities.”
He added “We have to figure out where we are borrowing one actor from where we are telling one cohesive story. Supergirl will participate but the story doesn’t actively begin there”. He also indicated that it’s a 3-hour story and there are three different scripts of 180 pages long that will be sifted through for the ultimate crossover. The story will begin from Flash episode as the wallpapers released for each of the shows has Hall of Justice as the background, goes to Arrow and Legends of Tomorrow.
Earlier, everyone thought that the mega DC crossover will be based on a universe-altering, earth-shaking event with its origins in Supergirl season 2. But she is just there without any real motivation, and probably during the same time she is dealing with another villain with trans-dimensional powers. The mega-crossover will be based on Super Friends coming together to fight the Dominators, a technologically advanced alien race hell bent on destroying the potential threat of Earth’s meta-humans.
The title of the episode is “Invasion!” across all shows except Supergirl where it’s titled “Medusa”. The trailer is really funny, particularly the Heatwave-Supergirl moment when Rori says to Kara “I am not going to say Supergirl as it’s just stupid”. Supergirl asks him – why are you known as Heatwave, he replies as he likes to light stuff on fire. There will be a big open-space battle sequence between heroes & aliens much like Civil war airport hangar sequence between Team Stark and Team Cap.
Check out the trailer: