According to BuzzFeed, Bloom reveals that she has written a song called “Super Friends” for Grant Gustin (Barry Allen/the Flash) and Melissa Benoisy (Kara/Supergirl) to perform in the episode “Duet”.
“As soon as I heard that they were doing a musical crossover, I e-mailed Mark Pedowitz who connected me to Greg and Andrew. I immediately offered them my services,” says Bloom in a statement. “As soon as they picked one of my song ideas, I hopped on the phone with my old Robot Chicken boss Tom Root and we brainstormed and, based on that brainstorm, I wrote up the song ‘Super Friends’. I am so excited to contribute more to the upward trend that is musicals in television and film. Music can be one of the most amazing and efficient forms of storytelling and character development. Also, it was really fun to write a comedy song for two superheroes.”
In addition, the CW has confirmed that the Oscar/Tony/Emmy-nominated songwriting team of Benj Pasek and Justin Paul (Dear Evan Hansen) have written a song for the episode called “Runnin’ Home to You” which will be performed by Grant Gustin.