The Flash, Arrow, Legends of Tomorrow, Supergirl

The CW

And with that, another crossover comes to an end. 

The Dominators have been sent away, the drinks have been shared, all the superheroes have now made their way back to their original shows, and everything (or most things) are well again in the world of the CW's DC TV shows. 

Tonight's Legends of Tomorrow wrapped up quite a week of crossover fun thanks to Supergirl, The Flash, Arrow, and Legends, and even after four hours of TV, there are still a lot of questions and things to discuss. Lucky for you, we got the scoop on what you just saw and what's to come from the bosses themselves, executive producers Andrew Kreisberg and Marc Guggenheim, who spilled all for reporters after a special screening of the episodes. 

Read on for all the juicy details on deleted scenes, what could have been, and what happens next! 

The Flash, Arrow, Legends of Tomorrow, Supergirl

The CW

1. Lynda Carter was originally written as the new president in the Arrowverse too, but the studio thought that would be too confusing with the two different worlds of Supergirl and the other shows. "In the  midst of, you know, time travel and aliens, it was just one—as Oliver would put it—one sci-fi problem too much," Guggenheim said. "Believe me, it was not for lack of wanting to as I was planning on being on set that day."

2. Kara's absence in episode 7 of Supergirl explained: "Hopefully people didn't realize it, but Kara was not in a lot of episode 7 of Supergirl, where she was captured by Cadmus, specifically to free her up for five days so she could appear in all these other episodes."

3. Normal people in the Arrow-verse don't suddenly know there are aliens and metahumans. "We had a line that we cut for time," Guggenheim revealed. "There was a line where the character Glasses—we call him Glasses, because we're so original—basically says, ‘Cover up what? A dozen, you know, weather satellites falling out of orbit?'"

4. There are no specific plans to address the fact that at least someone in the government knows that Barry Allen is the Flash. "As you know, the heroes having secret identities is probably the least interesting aspect of these shows, as far as Marc, Greg [Berlanti], and I are concerned," Kreisberg said.

5. We haven't seen the last of Stein's daughter: The revelation that Stein accidentally changed time to give himself a (very, very smart) daughter will have an effect on the show. "We haven't seen the last of her. You'll see her again in a few episodes," Guggenheim revealed.

The Flash, Arrow, Legends of Tomorrow, Supergirl

The CW

6. Flashpoint hasn't been wrapped up, but it might be overshadowed by something huge on the horizon. "There's a villain coming up who's another one of the husk villains that was created by Alchemy, so there's that to deal with," Kreisberg explained. "But the midseason finale, episode nine, kind of creates a new problem for our heroes that they weren't anticipating, something that they've never faced before. It's so big, we're actually considering changing the saga sell from talking about Flashpoint to talking about that, because that's really what's driving the episodes for the rest of the season, actually. Flashpoint won't loom as large as the challenge that presents itself in 309."

7. The mystery surrounding that message from future Barry : "The message from the future relates to Flashpoint, but it also may relate to something else coming up," Kreisberg explained, reluctantly.

8. Supergirl's new breach device (thanks to Cisco) will make future crossovers easier. "They've gotten to the point where we wanted to make that a little bit easier," Kreisberg said. "The next time we do it, it means it doesn't necessarily have to be because Oliver and Barry need Kara; it could be because Kara needs them."

9. Aliens won't be a major part of any of the DC shows going forward, other than Supergirl. "Now that possibility is open because they've faced aliens, there's certainly no plans to have an ongoing or bring up an alien storyline on Arrow," Kreisberg said. "That really feels like the purview of Supergirl."  

The Flash, Arrow, Legends of Tomorrow, Supergirl

The CW

10. But the Dominators aren't done yet. "The Dominators will return on Supergirl later this season," Kreisberg confirmed.

11. The Dominators were originally going to look a lot more like the characters from the comics, with long green robes on, but some features had to be cut for time (and money). "Originally we had designed the Dominators with the green robes that were very iconic of the comic," said Guggenheim. "When we decided to do all of 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."

12. Arrow's holograms were not originally going to be in the episode, but Guggenheim came up with it as a way to include even the actors they couldn't get for new footage (ahem, Colin Donnell and Colton Haynes). "At the time, I didn't know who we could get and who we couldn't, I'm like, this is a way we can get them."

13. Artemis/Evelyn wasn't in the Arrow episode simply so that last week's cliffhanger—the fact that Artemis is working with Prometheus—wouldn't distract us, according to Guggenheim. "I will say, you will get a payoff to 507's cliffhanger with respect to Evelyn big time in 509."

Arrow, Invasion

CW

14. A few sweet moments had to be cut out, like Sara hitting on Kara, and Kara responding "I think you wanna meet my sister," according to Kreisberg.

15. The Star Labs training facility was very much supposed to look like the Hall of Justice. Old footage of a particular building in Cincinnati was repurposed to look like the Justice League headquarters, with a special effects team even changing some scenes from day to night. "It's probably my favorite thing in the whole crossover," Guggenheim said.

Supergirl airs Mondays, The Flash airs Tuesdays, Arrow airs Wednesdays, and Legends of Tomorrow airs Thursdays at 8 p.m. on the CW.

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