All that's known for certain about Reiko is that he was a general for Shinnok and he was once a minion of Shao Kahn. It was hinted he had some sort of connection to Sareena or Kia.
Anything beyond that is rumor and speculation.


His original ending had him simply walk into a portal and that was it. But at some point someone decided to add the scene where he puts on Shao Kahn's helmet to add "intrigue" to his character. Some believe his ending was meant to imply he was Shao Kahn, even though Ed Boon confirmed Reiko is NOT Shao Kahn. Some believe he became the ruler of Outworld. Some believe he was Shao Kahn's decoy.
Truth is there's been no further info on what the hell Reiko's ending was supposed to mean, so take it as you will.

Wow, that's pretty cool. Yeah I hope he makes a return in a future game if not Deception so that we can learn more about him since he's never spoken. Or at least learn about him in Konquest mode, but I'd really like to see him as a selectable fighter again.

I always thoguht he was Shoa Khan but the Shoa Khan that we knew was simply a Decoy

My theory is that in the MKDA intro, Shang & Quan killed Reiko, while Shao was in hiding, powerless. I'd love for Reiko to make a return in Deception.

I hope he does come back some time... I think he's being kind of "showed" in deception a lot (kind of like tanya was in DA...)
ASo I'm hoping he'll be back 4 MK7 and then we'll find out everything about him