Fleischer's Comet was a comet.
Doctor Cornell guaranteed the press that Fleischer's Comet would not come anywhere near Earth. However, after failing to conquer the planet, Darkseid used the Doomsday Magnet to alter the comet's course. In the aftermath of the disaster, there would be no proof he violated the pact with New Genesis. Superman and Supergirl destroyed the comet before it could cause any damage.
- This comet's name is derived from Fleischer Studios, which produced 9 out of the 17 "Superman" serials released during the 1940s.