Mortal Kombat fans think that the man underneath Scorpion's mask in Mortal Kombat 1 could be Kuai Liang (the second Sub-Zero in the original timeline) and not Hanzo Hazashi.
Earlier this week, NetherRealm updated the official Mortal Kombat 1 website to add a bunch of character bios for all of the fighters that we already know are going to be in the game. Beyond confirming that Raiden is Earthrealm's champion this time around and that Johnny Cage has once again fallen from relevancy, some of the most noteworthy bits of information come from the bios for Scorpion and Sub-Zero.
In fact, as highlighted by Twitter user BruskPoet, the information that we get from the bios for Sub-Zero and Scorpion might be hinting at a big change in the latter's identity. In the original timeline, Scorpion was Hanzo Hazashi, a Shirai Ryu warrior who was killed by Bi-Han (until the Quan-Chi retcon at least) and then became a revenant.
Since Mortal Kombat 1 was first revealed, one of the big twists is that Scorpion and Sub-Zero are brothers this time around, rather than lifelong enemies. With this in mind, some fans have started to theorise that Scorpion is Kuai Liang, the second Sub-Zero and brother to Bi-Han, instead of Hanzo Hazashi, the man behind the mask (or skull, I guess) since the very start of the series.
There's a surprising amount of evidence behind this theory. For starters, the fact that Scorpion and Sub-Zero are brothers in this timeline and both part of the Lin Kuei already suggests that it's not Hanzo as Scorpion this time around. He's also clearly not an undead revenant, something that clearly separates him from the Scorpion that we knew.
Then there's the information from the character bios, which plainly states several times that they share a father, suggesting that it's a blood link and not a case of Scorpion being adopted. Although the character bios for both Scorpion and Sub-Zero don't mention the real names of either of the characters (likely to preserve the surprise), we know from dialogue in the fighter intros that this timeline's Sub-Zero is Bi-Han.
Those of you hoping that Scorpion is still Hanzo Hazashi might be thinking that Kuai Liang just doesn't exist in this universe, but it's already been confirmed that he does as Kenshi will directly reference him in a character intro and say that he mentioned to avoid the Black Dragon. This isn't enough to confirm that he's Scorpion, but it does confirm that he's alive, has interacted with Kenshi, and seems to align with the good side, all things that can be attributed to this timeline's Scorpion.
There's a chance that this is all one big red herring for Scorpion to still remain as Hanzo Hazashi, but adding it all up certainly makes it seem like Scorpion in Mortal Kombat 1 will actually be Kuai Liang, before eventually assuming his true identity as Sub-Zero when this timeline's Bi-Han inevitably goes evil.