New Details on ‘Flash’/’Supergirl’ Musical & 4-Night Crossover

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We’re greatly anticipating the return of all the Arrowverse shows this fall. However, what’s most exciting are the planned crossover episodes premiering this year. The Flash and Supergirl will unite again sometime this year for a two-episode musical crossover. Details are still lacking, but Greg Berlanti has offered an interesting tease.

“We just finished writing the fall crossovers,” he told IndieWire (via SuperHeroHype). “And now we’re trying to figure out how to produce them. That’s probably the most challenging thing we do all year. And now we’re doing it across three shows! But next week we’ll have to start talking about clearing music. I have a few ideas for tone and style in my head but we’re just starting to talk about what that can be. I do want to try and get an original piece of music written. As we make a deal on that we’ll probably make some announcements on the original songs.”

For the original songs, Berlanti wouldn’t say much, but he did add the following:

“I can’t say yet because we don’t have a deal yet, but I did speak to someone we’re really excited about. There are some writers I’m incredibly excited to work with.”

He also spoke on the difficulties involved in crafting the four-night crossover. By doing so, a few more specifics have come to light. Most notably, the Supergirl episode won’t participate, per se, though the crossover arc will take off there.

“You really are trying to run a single production across three different productions. But they’re run as three separate entities. We have to figure out when we’re borrowing one actor from where. We’re telling one cohesive story; ‘Supergirl’ will participate, but the storyline doesn’t actively begin there. There are some characters who show up in her episode, but the story begins with ‘The Flash’ episode and goes to ‘Arrow’ and ‘Legends of Tomorrow.’ We’re just getting into designing the bad guy for it, and we start now but it doesn’t air until the end of November. We will put a lot of time between now and then figuring out visual effects sequences. Just today I was holding the three scripts back-to-back – that’s 180 pages of material. It’s a three-hour story, almost a miniseries.”

It was previously revealed that Supergirl would provide the connective tissue that brings the four shows together. Should we expect this villain they’re just beginning to craft to be heavily tied into her world? Tell us your thoughts and theories in the comments below.

The Flash returns October 4, followed by Arrow on October 5. Supergirl’s second season begins airing October 10, and Legends of Tomorrow will close out the returns on October 13.

Images: CBS, The CW