This tough new attitude and rebellious streak of Superman's is definitely going to take some getting used to, but so far I think I'm liking it. Also cool seeing him have to struggle a lot more with everything.
Story definitely could have been fleshed out a bit more though. Morrison rushed through it all so fast, that it took me a couple read-throughs to understand what all was going on with the train and the hijacker and Lex and the businessman.
Batgirl was good as well. Unlike others, I never got into the whole Birds of Prey and Oracle thing, so I was perfectly fine seeing her back as the original Batgirl.
My favorite was probably Detective though. For some reason I've always had trouble accepting The Joker as being truly dangerous, but this time the sheer and utter madness
of the character really came through strong. And of course the art was absolutely fantastic.