At this point, I have no idea if this takes place in the Nu52. And I don't really care. I just want to see Morrison reach the ending of his grand Batman saga, end it the way he wants to, and if it doesn't like up with what everyone else is doing, then so be it.
As awesome as this issue was (and it was awesome -- I loved the way Morrison conveyed Bruce's relationships with Jason and Damian), it also feels like we're nearing the end, that Morrison is pulling his toys off the table and putting them away.
Also, this Leviathan saga is starting to feel like "Court of Owls" and "Death of the Family" all rolled into one -- an enemy from the shadows is striking out at Bruce on a personal level, and an enemy is hitting at Batman by attacking his allies. Coincidence or a larger plan? I'm not sure.