- Development Gag:
- The game itself is a reference to "What if X fought Y?" theories since the days of Mortal Kombat II, when Kano, Sonya, and Goro were removed from the game.
- Blaze was the nickname people gave to the ablaze Palette Swap of Liu Kang that appeared in the background of The Pit II stage. He first appeared in Deadly Alliance as a Secret Character and later become a very important character in this game.
- Meat is a reference to a bug in Mortal Kombat 4.
- Franchise Killer: The game's underwhelming reception dampened hopes for a new game with an all new cast and combined with the mixed response of Mortal Kombat vs. DC Universe, ensured the next game was a reboot.
- No Export for You: The Xbox version is only released in North America.
- Serendipity Writes the Plot: Armageddon's engine couldn't handle a four-footed fighter, so the developers were faced with the choice of cutting Motaro down to two legs, or removing him from the game entirely. They went with the former, giving the story line explanation of a curse caused by the Shokan.
- Torch the Franchise and Run: The Battle of Armageddon was intended to do this so that the next game could throw away everything from past games and have a practically new cast. They were able to accomplish this without having to sacrifice old continuity, or at least whatever was left of it from their constant tinkerings, by having the sequel pick up where this game left off (with all the good guys dead or dying) but go back in time to avert it.
- What Could Have Been: Sektor and Reptile were considered for the Motor Kombat roster.
Trivia / Mortal Kombat: Armageddon