Planet Doom is one of the planets of the Drule Empire. In the Voltron: Defender of the Universe series, the planet was ruled by King Zarkon.
It's the location of the third and final gate as well as the crystal key.
List of Cameos during the fight
- Knight and Ostrich from Joust
- Scorpion from Ultrabots
- Heavy and Pyro from Team Fortress 2
- Luminous and Blaster-Tron from Skylanders
- Duke Nukem from the video games of the same name
- Jim Raynor from Starcraft
- Scorpion from Mortal Kombat X
- Onslaught from the Transformers film series
- Freddy Krueger from A Nightmare from Elm Street
- Jason Voorhees from Friday the 13th