Liu Kang was Earthrealm's champion, winner of two straight Mortal Kombat tournaments. Under Raiden's tutelage, Liu Kang defeated both Shang Tsung and Shao Kahn, becoming a legend throughout the realm. But when Shao Kahn's Outworld forces invaded Earthrealm, Liu Kang split with Raiden over how to respond. During a disagreement between them, Liu Kang was accidentally killed. His soul was collected by Quan Chi, who used it to create and evil "revenant" version of Liu Kang. He now serves Quan Chi and the Netherrealm.
With Shinnok defeated, Liu Kang explored the Netherrealm--a world that, without Shinnok's controlling power, had descended into chaos.
Liu Kang was no sorcerer or Elder God, but his fighting skill was more than enough to beat Netherrealm's demons into submission.
Liu Kang realized that Netherrealm was his for the taking--and that ruling appealed to him.
He would assume Shinnok's throne--and ponder the konquering of other realms.