A major character from the Woman of Tomorrow comics was left out of the Supergirl movie. This may surprise some, given the movie includes characters like Lobo who were not in the original story. However, there are several good reasons why they have yet to be introduced into the DCU.
The character in question is Comet the Super-Horse, who played an important role in Supergirl: Woman of Tomorrow. In the sixth chapter, Krem of the Yellow Hills acquired a magic globe he hoped to use to kill Kara Zor-El. However, Comet helped her to outrun the deadly sphere. Later, he saved Supergirl’s life as she appeared to be helpless before the brigands working with Krem.
The most likely reason Comet was left out of the new movie was expedience. The Supergirl: Woman of Tomorrow comic is made up of several vignettes. Krem is continually evading capture and finding new contrivances to delay Supergirl catching him. Including the scenes with Comet would have added little to the film’s overall plot Additionally, introducing Comet would have taken previous time from a movie that already had to introduce Supergirl, Lobo, and the mythology of Argo City. The biggest issue, however, is that Comet the Super-Horse may have the single most complicated and creepy backstory in all of DC Comics.
DC’s Comet the Super-Horse explained
First appearing in 1962’s Adventure Comics #293, Comet the Super-Horse was originally a centaur named Brion, who lived in Ancient Greece. Brion fell in love with the sorceress Circe, best known in DC Comics as a Wonder Woman villain. The centaur saved Circe from an assassination attempt by rival wizard, Maldor. When asked for a reward, Brion asked to be turned into a human, so he could properly court Circe and hopefully win her heart.
Unfortunately for Brion, Maldor switched the transformation potions, turning him into a horse forever. Circe made up for this by giving Brion a different potion granting immortality and the power of the gods. However, Malor, still not content with his revenge thus far, used a spell to trap Brion on a distant asteroid. He remained there for centuries, until, by chance, the passing of Supergirl’s rocket destroyed the asteroid and let Biron break free.
Brion fell in love with his savior, and followed her back to Earth. He spied on Kara for some time before revealing himself to her in 1962’s Action Comics #293. As Comet the Super-Horse, he helped Supergirl fight crime, hoping to find a way to become human permanently. He managed this a few times temporarily, posing as rodeo rider “Bronco” Bill Star to romance Supergirl in secret.
Apart from Supergirl: Woman of Tomorrow, there’s no evidence Comet the Super-Horse exists in the modern DC Universe. Strangely enough, no writers have felt compelled to modernize this complicated story. Particularly as it involves a character who stalked a teenage girl while posing as her pet! All this baggage, coupled with the slow pace of the source material, offer ample reasons to keep Comet the Super-Horse out of the DCU.
