The Flash visited Earth-2 at long last in "Welcome to Earth-2," a trip through the Multiverse that resulted in a lot of doppelgängers, a lot of Easter eggs and a lot of licorice. Executive producers Aaron and Todd Helbing took the time to chat with a group of reporters about the episode's big moments, the nods to the series' expanded universe and what to expect in next week's "Escape from Earth-2."

Full spoilers for "Welcome to Earth-2," as well as teases for future episodes, continue below.

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1. Cisco Is Ready to Use Reverb's Powers

2. How the Easter Eggs Were Decided

3. The Big Zoom Reveal Is Coming Soon

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4. We'll Learn More About the Other People Zoom Captured

5. We'll See the Negative Effects of the Speedster Drug

6. Earth-2 Barry Will Have His Time to Shine

7. Why Cisco Took Licorice With Him to Earth-2

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8. What's the Deal With Hal, Diana and Bruce Being on Earth-2 Barry's Phone?

9. The Hunter Zolomon Tease Will Get a Payoff

10. Why Jay Didn't Tell Caitlin Her Earth-2 Doppelgänger Is Evil

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11. What Comes Next

12. There's More of Earth-2 Still to Come

"Once you're exposed to something that's possible, like the first time Tony Hawk did a 720 on a skateboard everyone could then do it, and so once Cisco saw the magnitude of the powers that he's capable of, everything's possible now in his mind. We may explore that," Aaron said of how quickly Cisco will be able to use his Earth-2 doppelgänger's powers.And no, there was never a plan to keep Reverb around longer. Todd said, "For the purpose of where we want to take Cisco, having him die there was sort of the best way to get what we want out of his character.""I think we had a giant board of 50 ideas and we had to just whittle them down to the bare bones," said Aaron. Todd added, "You try to make that organic as much as you can, but sometimes we've just got to throw that in there."As for whetherwhat some of the Easter eggs were that didn't make the cut, Todd said, "We would tell you, but they'll probably end up in other episodes." (And no, that wasn't Justin Hartley's Green Arrow in the Multiverse, they confirmed.)When asked how long viewers will have to wait to learn Zoom's identity, Todd offered, "The next couple episodes it starts to unravel. You get to see what's really going on," and Aaron piped in, "It really starts to heat up quickly."Fortunately Zoom isn't completely ready to drain Barry of his speed just yet. "Obviously that is his big plan to take his speed, so now that he has him he has 50 percent of what he needs," said Todd. Aaron added, "He doesn't have all the ingredients, per se. We established earlier in the season that he needed other aspects or other people to help that process."Zoom doesn't have more people held captive beyond who we've seen, but the two Barry sees in his prison are very important. "The man in the mask, he's there for a reason," said Todd. "This is really the first time [Jesse and Flash] meet. They're in Zoom's lair. You'll see in the next episode how this relationship starts and forms and where that leads them to.""Further down the road you will definitely see what happens when you take Velocity 9 and how bad it can go," teased Aaron."In the next episode, you will see a lot of Earth-2 Barry," said Todd. "He's quite a bit different than Earth-1 Barry. From Joe's point of view, he's pretty selfish, and I think that plays into what happens to him in the next episode.""If you're going to go to an alternate universe, why would you not take licorice?" Todd quipped, confirming that Cisco did in fact take Twizzlers. "Gotta take a little piece of home with you."Aaron's answer, sadly, was simple: "Just Easter eggs, just for fun. Just Easter eggs right now."Or at least that's what the Helbings seem to be saying. "We do things on purpose in the show, but as you know sometimes we follow the way things are in the comics and sometimes we don't. That's pretty much all I'm going to say about that," Todd said. Aaron added, "I'd be pretty confident that you'll see Hunter Zolomon again."Aaron explained, "I don't know if you want to tell somebody that their counterpart's evil." However, Todd did say that the knowledge of the doppelgängers will have an impact."Of all these experiences and Cisco and Barry meeting these doppelgängers, a lot of that information they now have, so they're able to bring that back -- if they get back," he said.As for whether Earth-1 Caitlin will ever become Killer Frost like she did in Earth-2, Todd said, "Right now, Caitlin is not affected. For that to happen, there's going to have to be some scenario that would trigger that. Right now, it's not a possibility.""Cisco and Wells are trying to come up with a plan of how to get Barry out of the predicament he's in, so they seek out help from somebody you would never expect and they do their best to set up this rescue mission," Todd teased. "On Earth-1, they still have to deal with Geomancer and the breach issue."Even after the second episode in this Earth-2 two-parter, expect this part of the Multiverse to play a role."You'll see quite a bit [of Earth-2]," said Todd. "It's cool, seeing these different realities. Some of these images we're pulling straight from the pages of the comic books, so it's really an amazing experience and a lot of fun."

The Flash airs Tuesdays at 8 p.m. ET/PT on The CW.Terri Schwartz is Entertainment Editor at IGN. Talk to her on Twitter at @Terri_Schwartz