The name of the hidden character Noob Saibot is the last names of game creators Ed Boon and John Tobias spelt backwards.
The Raiden hat no longer exists, it was destroyed when Carlos Pesina accidentally fell on top of it towards the end of filming.
Baraka's first mask was bigger and looked like a demonic version of Shrek. It didn't work out. The crew later bought a Nosferatu mask that they slightly modified by attaching fake fingernails as teeth to it, which led to the Baraka as portrayed in the game.
Fatality moves can be controlled manually, such as sliding their enemy off Tomb spikes, aiming Kung Lao's hat throw and intensifying Raiden's electrocution, as well as making Johnny Cage knock two or three heads off.
First appearance of Babalities, finishing moves that turn the opponent into a baby version of the defeated character. The developers added those in response to the criticism the previous game received for their notorious violence.