These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Character Rerailment: Towards Jax (retroactively from Special Forces and Deadly Alliance), the game seem to be closer in line with Jax's original characterization. Justified in that it's supposed to be a retelling of MK2.
Dork Age: Kung Lao's portrayal in Shaolin Monks. He's jealous of Liu Kang, when in the past he had only cared for the protection of Earthrealm. It became canon as of Armageddon, with his ending, and sticks in Mortal Kombat 9, although there he at least has the primary motive of avenging his ancestor's death at the hands of Goro.
What an Idiot: This could be applied to everybody. Liu Kang and Kung Lao fall really easily to Shang Tsung's trap and Raiden never tries to stop them from fighting his assassins. Raiden does stop them but right at the end Tsung is already done with his plan.