Sub-Zero is first villain in Mortal Kombat series.
Sub-Zero Is the main villain in 2021's Mortal Kombat, not just Scorpion's rival, because they want to stretch the source material into a series.
Bi-Han - Sub-Zero, Mortal Kombat Wiki
Why is it that Sub-Zero and Scorpion are buddies in the first Mortal Kombat movie? - Quora
Sub-Zero (2021), Villains Wiki
Every Sub-Zero Move In Mortal Kombat 2021
Why Sub-Zero From 2021's Mortal Kombat Movie Looks Familiar, mortal kombat 2021
How Sub-Zero Can Return In Mortal Kombat 2
Iron Studios expands Mortal Kombat Klassic collectibles line with Scorpion and Sub-Zero
Why Sub-Zero Is Mortal Kombat 2021's Villain (Not Just Scorpion's Rival)
MORTAL KOMBAT's Joe Taslim on Bringing Sub-Zero to Life