Before I begin, I have to point out that this is coming from someone who has been a loyal, diehard MK fan since I (accidentally - I didn't even know fatalities were a thing!) ripped Sonya blade's head off way back in the spring of 1993.
Anyway, here goes:
Some of you MK fanboys are fucking dorks. Listen, the MK universe is fictional. It's contrived. It's always subject to arbitrary change and it's always at the mercy of its whimsical creators. Therefore, this perpetual argument that (character x) doesn't "fit" MK is inherently illogical and patently moronic. Based on the reasoning some of you have endorsed, you just as easily could have argued that Stryker, Sektor, and Cyrax didn't belong in MK before MK3 dropped.
What you guys really should be writing is that (character x) doesn't fit YOUR idea of what the MK universe SHOULD be, not what the MK universe actually is (I.e. What its creators have decided it to be)
Lastly, lighten the fuck up! It's not real. It's a fictional universe created for a video game. Do yourselves a favor: Sit back and enjoy the innovations of one of the most creative video game developers on the planet. And if you really don't like a few characters, do what I do: Take them into training mode and beat the ever-living shit out of them. (That goofy sounding fuck, reptile, will be getting his daily beating shortly
)