Exective Producers Andrew Kreisberg and Marc Guggenheim revealed via EW.com that there were a number of scenes that were cut or spoken about but never included in the four-way “Invasion” crossover between “Supergirl”, “The Flash”, “Arrow”, and “DC’s Legends of Tomorrow”.
“[The crossover] came in wildly over [time], not surprising,” executive producer Andrew Kreisberg says. “You’ve got to keep the plot going, and you had to have room, especially in these episodes, which probably had even grander visual effects sequences than we’re used to in an average episode, so it tended to be those little jokey moments that fell by the wayside.”
“There was a little exchange between Sara [Caity Lotz] and Kara [Melissa Benoist] that I really liked – I don’t think we even filmed it – where Sara says, ‘Hey, do you want to get a drink when this is all over?'” Kreisberg reveals, “and Kara says, ‘I think you wanna meet my sister.’ Just the idea of starting the Sara/Alex [Chyler Leigh] shippers going…”
“There were a lot more nods to the comic book,” Kreisberg says of the Dominators. “There was discussion about the size of their circles and how that was indicative of where they stood in the caste system, so I’m sorry some of that stuff went away just because it was great flavor, and I think people who are fans of the original comic book would have seen a lot more of our joy at adapting Invasion in there, but unfortunately, to get these down to the proper time, that’s the kind of stuff that tends to fall by the wayside.”
“Originally we had designed the Dominators with the green robes that were very iconic of the comic,” Guggenheim says. “When we decided to do all the Dominators full CG, as we ended up doing, the robes had to go away because the presence of the robes made animating them prohibitively impossible.”
“There was a Supergirl moment on the Waverider that I really wanted to get in there,” Guggenheim says. “I’m not going to tell you what it is, because we may do it next year, but Supergirl never ended up on the Waverider, so we couldn’t do the moment.”
Fans were treated to possibly the coolest in-joke during the final part of the crossover, when Ray Palmer (played by one-time Superman, Brandon Routh) tells Kara/Supergirl (Melissa Benoist) that she looks a lot like his cousin.