http://mortalkombat.wikia.com/wiki/Mortal_Kombat_WikiWhen (original Sub-Zero) died in the first Mortal Kombat tournament at the hands of Scorpion, his soul, corrupted by years of violence, descended to the Netherrealm's Fifth Plane. The evil within his soul was unleashed, stripping him of pride, compassion, and everything else "human." He wishes not only to remain in the Netherrealm, but to conquer and rule it. Though he has been seen in the service of conquerors such as Shinnok and Shao Kahn, his ultimate allegiance is to himself.
Still hoping the MK HD Arcade Collection is real and we just get that.I would of been happy with a mk2 port since that never came out on xbla (only psn)