This topic is interesting to me since I follow noobde's twitter almost daily.
I'm still holding out hope for this tweet:
https://mobile.twitter.com/noobde/status/482338829081137153
to be a nod towards Sareena. She says it here:
Sub-Zero Mythologies is seriously my favorite storyline, although playing it is difficult.
Sub-Zero going on a long journey literally through hell and back, defeating four gods (Fujin/Fire/Earth/Water), going on to defy and defeat Quan Chi & Shinnok, all the while guided by Raiden with a side intriguing interest in Sareena is what I'd like to see again.
It also makes the character of Noob Saibot tragic in the sense of how much he defied Quan Chi in life.
Sareena could have a demoness style with the variation addition, maybe devil horns.