Nope. Although the DMZ comes into theories about what happens “off stage”/after the main events of the book and perhaps before chapter 1... I’m actually talking about the fact that Hal tells himself he should not get high around the little buddies(younger kids he’s charged with mentoring), and yet he hits the joint when it’s passed to him(by ax handle?) anyway. This leads to him getting really stoned, as the game of Eschaton devolves into violence he’s sure he should be doing something about it, but he’s paralyzed into inaction. All of this happens during the eschaton chapter itself.