Berlanti previously announced that a The Flash/Supergirl musical crossover would be happening and air as two episodes of the respective shows.
Arrow, The Flash, DC’s Legends of Tomorrow and Supergirl executive producer Greg Berlanti has talked to IndieWire about the four shows’ upcoming, anticipated seasons and how they will crossover.
“You really are trying to run a single production across three different productions. But they’re run as three separate entities.
“And now we’re trying to figure out how to produce them.