So I just watched the teaser trailer to Frozen 2 and while I was getting superhero training vibes from Elsa's interaction with the sea, I realized that this is a musical which got me thinking, has there be a superhero musical movie?
Just to cover the obvious superheroes have been covered as a musical in different formats:
Live Theatre: Spider-Man: Turn Off the Dark (2010)
Television: "Duet" (The Flash) (2017)
Web: Dr. Horrible's Sing-Along Blog (2008)
Something tells me there is a Bollywood movie or two that covers the topic, but primarily interested in Western intellectual property.
If there is a straight to video earlier than Dr. Horrible, that would be interesting to know.