So I was playing MK3 on my PC having a blast, and went into a sort of MK frenzy info mode.
I found out that Midway actually got the MK theme song from a group called 2 unlimited from a song called Twilight Zone.
Twilight Zone was released in March of '92, where the First Mortal Kombat game came out in August '92.
Here's the 2U song.
And for comparison, the MK song.
Oh, you sneaky ducks at Midway.