Mortal Kombat 1 doesn't really try to hide Sub-Zero's evil transformation
Mortal Kombat 1 hasn't done the best job of hiding Sub-Zero's true evil nature so far, but the dialogue between him and some of the newer fighters in ...

Mortal Kombat 1 hasn't done the best job of hiding Sub-Zero's true evil nature so far, but the dialogue between him and some of the newer fighters in the game confirms it almost perfectly.
One of the main selling points of the story in Mortal Kombat 1 is that it redesigns and reinvents almost every character on the roster in some way. Some of these changes are significant, such as Scorpion now being Kuai Liang instead of Hanzo Hazashi, while others are relatively minor, like Kenshi working with the Yakuza.
While it may seem like the big selling point is how different some characters will be, the larger message of the game seems to be that certain fighters are destined to end up one way or another, such as Shang Tsung returning to his evil ways. The biggest example of this is Bi-Han, the current Sub-Zero of this timeline, who in the original timeline eventually became the evil Noob Saibot.
One might think that the union with his brother in Liu Kang's universe would prevent him from leaning towards evil again, but Mortal Kombat 1 has painfully made it clear that this will not be the case. This was already evident in the first trailer, but some new introductory dialogues shared between Sub-Zero and some recently revealed characters have highlighted the planned "twist" even more. Potential spoilers for Mortal Kombat 1 will follow, so be cautious if you wish to go in (snow)blind.
As shared by YouTuber unCAGEDgamez, Johnny Cage has some interesting dialogue lines with Sub-Zero before they fight. Some of them are just meant to show how annoying everyone finds Cage and how irritated Bi-Han seems to be with the good guys (like referring to Liu Kang recruiting him as his "worst decision ever"), but there is one that is particularly distressing.
In an introductory dialogue, Johnny Cage directly asks why Sub-Zero has become a "renegade," as he believes he could have made him a star. Bi-Han responds by saying that he wants "power, not fame." This makes it incredibly clear that Sub-Zero will rebel against the rest of the team and turn evil at some point in the story, ultimately leading him to become Noob Saibot once again.
However, this is not the only new piece of the introductory dialogue that illustrates this change. As shared by YouTuber MKIceAndFire, a part of the dialogue between Sub-Zero and Liu Kang also makes it clear that he will challenge him. For example, when he says that Earthrealm does not belong to him to rule, and when Liu Kang reproaches him for his actions that result in people being killed.
There is a possibility that Bi-Han will simply test the boundary between good and evil and avoid becoming completely corrupted, as was the case in the original timeline. However, all the previous dialogues make it clear that this is unlikely to be the case.