Two options I'm seeing: either Kaneki dies or Touka comes sweeping in to the rescue. Touka seemed primed to do something when she last made an appearance, and from a meta standpoint, right now would be a pretty ideal time to put the two back together. And this isn't the kind of thing where Kaneki can just walk it off (lots of buildup, end of the volume, it would be way too cheap for him to just heal by himself and walk away).
Kaneki isn't gonna die, but Touka would. Better stay away. My guess is Kaneki's gonna get captured as quinque material. Would also be a good opportunity to bring back Arata, or whatever's left of him. Maybe Yomo, the One-eyed owl (?) or someone completely unexpected could bail Kaneki out even now, but I find it unlikely.
Still, his development was headed towards a balance between his ghoul and human side. If he comes out of all this in better shape...wow, dude.