"Sub-Zero: After the victory over Shao Kahn, Sub-Zero learned from Raiden the truth, that the Lin Kuei were ultimately responsible for the deaths of Sub-Zero's and Scorpion's families. Enraged, Sub-Zero offered Scorpion a chance to share in his quest for vengeance. With the might of fire and ice combined, they were a storm of vengeful fury as they cut down their foes. Once justice had been done, Sub-Zero and Scorpion disappeared into legend, emerging from obscurity only to avenge the innocent. The Forces of Darkness will never stop this Deadly Alliance."
January 1, 1970
https://en.wikiquote.org/wiki/Mortal_Kombat_(2011_video_game)