Out today. Looking forward to reading this, shame I'll have to wait 6 months before the conclusion is released but as it's probably my favourite arc in Batman I'm pleased that it's all going to be finally available. I've not seen these issues before so keen to see what happens with the Riddler between Cataclysm and NML vol 1 as he was absent from the rest of the volumes.
Hopefully this may pave the way for Knightfall: The Search.