Well that's because this reboot is about two things, giving a fresh updated take on the characters, and trying out new titles without having to worry about continuity too much. That, along with initially strong reviews on the issue, I gave it a shot, because this blog is about trying many new titles out, not being closed minded.
And this issue was, not stellar. I know some people love Brian Azzarello, and get excited whenever he writes for a big-name, especially Batman (recent work includes "Flashpoint: Batman Knight of Vengeance" and "Joker") but to me Azzarello is a good, not great writer.