In the GBA game Mortal Kombat: Tournament Edition (which is pretty much Deadly Alliance version 2), you can apparently play as Sareena. I went searching for her on the net and found her ending within the game. The link is below:
http://www.vgmuseum.com/end/gba/d/mktsar.htm
Sub-Zero and Sareena apparently have a relationship, however not without cost.
Sektor's is found here:
http://www.vgmuseum.com/end/gba/d/mktsek.htm
He's starting a cyborg army called the Tekunin.
Sorry if this was already known or posted before, I'm a little new to this place.