Maybe it's the optimism I've had from the fact Batman is doing better since Tynion left or maybe that the whole fear State thing is over (I'd say both), but I'd say this was pretty good for a prelude. While I'm not thrilled about Batman being gone through most of this, I guess it makes sense to show what's happening back in Gotham while he's out of town.
It's amazing how Gotham learns so little from its mistakes. But without some kind of Arkham, what will it do? Letting the Justice League take matters into their own hands proved to be a disaster as proven in Salvation Run many years ago. So I guess their options are limited. Sucks to be that city.
I am truly glad Fear State is over, so now maybe we can see this series pursue its own stories without having to always follow what's happening in Batman all the time like over the last couple of years. I'd say Tamaki does better writing when allowed to stay original and not have to follow the other title.
The art was also very good. All-in-all, this has been one of the better Detective issues I've read in a while. If the upcoming Tower saga is decent enough as well I may stick with Batman a while longer.