Since its early on street date, I'm going to stay spoiler free for now:
ACTION: Really liked it. I think its an interesting take, and this is very much the same Superman from the original Action #1.
ANIMAL MAN: Very solid story. Ugly art, but maybe compelling for this story..
BATGIRL: OK. I'm not a fan of Barbara being back in the suit, although Gail seems to have a plan, but it may take a while for us to find out what it is.
DETECTIVE: Liked it more than I thought I would. I have a feeling BATMAN is going to be MUCH better, but this was interesting enough that I'm curious about the next issue.
HAWK & DOVE: I'm trying to read it, but I'm struggling to get past the art.
JUSTICE LEAGUE: Hated it. I think Johns is very hit or miss, and this was a HUGE miss. Lee is going through the motions (and I expect issue #3 to be at least 25% Carlos D'Anda).
JLI: It was...OK. I like the character bits, was not impressed by the plot. And yes, Booster is still from the future. Feels lightweight - which is a problem when it doesn't have the charm of the old series.
STORMWATCH: I like Paul Cornell. I didn't like this. It felt castrated compared to the WS book. And way too many "Hey, these are my powers" bits in it.
SWAMP THING: I'm a huge Scott Snyder fan, so I was predisposed to liking it. And I thought it was very good. Yanick Paquette continues to do a nice Kevin Nowlan impression.
So far it appears that the "new 52" is not a happy place to live. Lots of murder in the Bat books.