I think Khan is done. He was stopped and rocked all along his career, but this time he was out cold. He looked in serious trouble on the canvas and it cannot be good for the neurons getting zapped like that. Khan was lacking functioning neurons in the first place and it would be cruel to want to see that again and again. I already got a serious sense of deja vu seeing him stopped. I was watching the 5th and he got zapped and thought to myself "This is familiar" and then the next round happened and I thought "Is this a replay of a previous fight?" and then I saw he was out of it completely and realised the script had turned even more hardcore. Not cool.