I dont think we gonna kill Savathun she is too smart for that, only one who is capeble of surrender i believe she will end up as our ally againts the pyramids/Entity and her Sister Xivu and i would love that she got way to big story build for that to end in first week of TWQ. And About Xivu? As bungie sayd,, Xivu is way to underrated in eyes of Guardians'' And i believe that.
But is that what she wants to believe she’s plans within plans gears with gears to her nothing is straightforward
But I do
Believe she will be a factor in this war as a third force
As for xivu with our focus on savathun and not her it’s gonna be a uphill climb to beat her