Glad to see Cassie back.
I wonder if Noob Saibot is the stand in for Cyber Sub. Rather than Bi Han as Noob being a wraith, it's a result of whatever Sektor does to "improve" him. In the old timeline, Kuai Liang becomes Cyber Sub, is killed by Sindel, returned to a human revenant by Quan, restored to life, then kills Sektor who has taken over the Lin Kuei. I wonder if whatever Sektor does to Bi Han to enhance him gives him the Noob Saibot move set, but it was a trick and now Sektor can control Bi Han and becomes Grandmaster. Liu Kang tells Kuai Liang in the expansion, according to the data mine, he thinks he can "fix" Bi Han, so I wonder if his Sub-Zero form is then restored and he just ends up getting Kuai Liang's arc of retaking the Lin Kuei from Sektor. Because Sektor in the old timeline becomes Grandmaster by killing his father, just how Bi Han did in this one, so I'm wondering if there's a parallel.