OK, so picture this.
Ba Nan Ji arrives, but rather than killing Kan Ki, he prioritises slaying Zenou to save his son (knowing Ri Boku is safe).
Kan Ki escapes in midst of confusion - by himself. He takes no one with him, not even the Saki clan. He simply disappears.
The Zhao chase after the cursed Kan Ki Army remnants led by Koku'Ou, Rin Gyoku and Ma Ron in a dogged pursuit. They are hunted down almost to the last.
Meanwhile, Shin and Mou Ten take advantage to organise a retreat back to Qin lands.
Back home, as the arc concludes, and perhaps the Q3 don’t learn of it for months (from a returning and disfigured Rin Gyoku?), Kan Ki didn't die just survive the, he actually resurfaced in another state.
We then close on a scene of Kan Ki indulging in some wine while Ordo sings his praises in front of the Yan king.