Some plans for May, maybe?
For anyone else considering the Musical MAYhem challenge, I've created a few lists based on Yarjka's links:
1. Documentaries for Broadway Musical Fans 
2. Modern Broadway Musicals Adapted to Film
3. Concert Films
4. Soviet Musicals

I also recommend Kelvin Cedeño's list of Rodgers and Hammerstein Musicals.

Here's one more list that I built: Musicals That Are Oscar or Golden Globes Best Picture Winners

Here's a related challenge, linked so I can find it easily later: MUSICALSx52 (2024). Its tag is #musicalsx524
The tag to use for the Musical MAYhem challenge is musical-mayhem-1

Specifics:
4 Black-and-White Films: Cinderella, You Were Never Lovelier, Top Hat, The Broadway Melody, Going My Way.
4 Academy Award Best Picture and/or Golden Globe Best Motion Picture Winners: Dreamgirls, Oliver!, Going My Way, The Broadway Melody.
3 Films Starring Gene Kelly, Fred Astaire, Ginger Rogers, and/or Judy Garland: You Were Never Lovelier, Top Hat, The Pirate.
3 Films Based on Musicals by Rodgers and Hammerstein, Stephen Sondheim, and/or Andrew Lloyd Webber: Original Cast Recording: Company, Cinderella, Cinderella, Cinderella.
3 Bollywood, Japanese, and/or Soviet Films: Interstella 5555: The 5tory of the 5ecret 5tar 5ystem, Inu-Oh, Aradhana!
3 Concert Films, Documentary Films, and/or Musical Biopics: Bad Reputation, Joan Baez: I Am a Noise, Superstar: The Karen Carpenter Story.
2 Cult Classics and/or Poorly Received Films: Interstella 5555: The 5tory of the 5ecret 5tar 5ystem, Purple Rain.
2 Different Versions of the Same Musical: Cinderella, Cinderella, Cinderella.
2 Animated Films: Snow White and the Seven Dwarves, Aristocats, Interstella 5555: The 5tory of the 5ecret 5tar 5ystem.
1 Sung-Through Film: Hamilton.
1 Modern Adaptation: Dreamgirls.
1 LGBTQ-Related Film: Rent: Filmed Live on Broadway (2008).
1 African-American Film: Purple Rain.