The masked subzero in mk3 isnt another character he was placed there called classic sub zero aka Bi Han before being Noob.

No he's not. Read his bio and ending bruh!

Were you even alive when UMK3 came out? I'm guessing you aren't aware that the arcade ladder endings are not canon story elements. Some (not all) character endings do contain inklings of truth relevant to the next game. Others do not have any relevance at all. UMK3 examples include:

Sheeva - she didn't defeat Motaro, she didn't turn the tides of the war in favor of the Shokan against the Centaurs

Sektor - did not kill Sub-Zero and did not annihilate the entire Outworld army by blowing himself up

Kabal - was not the chosen one and didn't save mankind. He was just there.

Stryker - did not defeat Shao Kahn and become champion of earthrealm.

Kano - did not nuke Shao Kahn's forces and then die trying to claim souls.

Those are just a few examples. There are simply some endings that have absolutely no relevance, and in some cases, characters that are there just for the hell of it.

Classic Sub-Zero was put in just for the hell of it. They were already putting in ninjas of every conceivable color, so there was no reason not to include him. It was a nostalgia/homage to Sub-Zero's ninja costume since so many people initially bitched about his MK3 design. His "story" and ending in UMK3 is completely irrelevant...a half-assed blurb one of the devs wrote on the back of a napkin when he was having lunch at McDonald's.
So, no. This isn't "the mysterious warrior who removed his Sub-Zero mask in UMK3". It isn't a 3rd Sub-Zero. There are not "many Sub-Zeros" (you misinterpreted Boon's trolling).

HAahahaah, was I born ? Didn't know we had clown in MKO. Cudos bro. What's your paypal so I can send you some money for the performance ;)

Looking back I always thought it was Quan Chi pretending to Classic Sub Zero in UMK3. That's why the were shocked to find out who it really was, and saying he would return in the 4th game.

Kool bro, Didn't thought of that. We need some MK maniac here to clarify that tho, there's a lot of possibilities, but it would be nice to know that there is another Sub, whoever he is.

His appearance was basically retconned/explained in MK4 to just be Kuai Liang dawning his brothers uniform.

Gameplay wise, he has MKII Sub-Zero's moves.

As for the ending, for years folks here have speculated either Quan Chi or Shinnok.
Legacy kind of hints Quan Chi, even though Shinnok is the one who could mimic moves.



Ka-Tra