This song lends itself well to metal. Especially the "they've crossed the line, it's time to fight them-- STOP THE BATS, STOP THE BATS" like, could you imagine a Beast in Black version of this song?
You should go full Metalcore or Deathcore with this. Have AJ's line be screams, Flutters' cleans, and the rest of the Mane 6's growls. It would sound fucking great.