There are a lot of good things to get excited about. Oracle is officially back in canon (granted part of the past), we have the old Superman back with his wife and son. The Titans are more than Tims' team. But there's one series I'm worried about going into the Rebirth. I don't want a good friendship to break up just to explain why one is on a team and the other is going undercover as a villain. Maybe it won't be so bad but it's good to be prepared.
There are other stories I'm concerned about like where Booster is, where Guy Gardner is and what's going to be done with some characters I love with writers I'm not fond of. But those are concerns for when Rebirth starts. It's weird to think that at the end of the month we'll get the first glimpse of things to come. I'll be trying out some of the titles although I won't officially be reading any new ongoings until July/August.
I'm also preparing for one book why reading up on Artemis to see how she'll differ or click with her pre-Flashpoint self. Reading past comments online I've seen a little criticism that she's rarely shown much besides her warrior side. Plus her origins should be intriguing as the Bana differ from the main Amazons and who knows if Rucka will change things from the present Amazon lore.