@6:02 not quite they are all ending where bruce wayne got a power of some sort. see that's one of the things about batman's no killing rule "its not for the criminals" its a reminder for batman that if he gets even a bit of a super power he will go BALISTIC. that "0 killing rule" isn't for them ITS for him because he can't control himself when he gets a superpower, we see it time and time again batman gets superman's powers and he goes on a war path and becomes much more violent then normal, the dark au's are a refection of that but its not JUST batman even superman and wonder women have dark au's we see one of them in the "injustice" au. superman suffers a major loss and he goes insane killing people left and right who disagree with him and wonder women encouraged it.