Got it from [MENTION=4805]Viking_Poodle[/MENTION].
Here (post #1589):
http://www.trmk.org/forums/showthread.php/30959-Official-Mortal-Kombat-X-Media-Thread/page80
I'm convinced enough.
The variation of Sub-Zero that Viking_Poodle heard vs Raiden likely IS Bi-Han.
It VERY much supports my theory of Bi-Han surviving the Soulnado and being cleansed in the process, and becoming the Elder God's Champion.
^^
Sounds a lot like Raiden is pissed that Sub-Zero is the new protector of EarthRealm.
It's possible that the Elder Gods made Bi-Han their Champion and protector of EarthRealm because they deemed Raiden unworthy of the title "Protector Of EarthRealm."