If you haven't read it, proced at your own risk.
Not gonna lie, I picked this comic mainly because Naomi was said to be in it. I was wondering how that will work. And I'm not disappointed. I like how her birth world is full of threats for not only her but Justice League as well. It's a nice way of building her own mythos. That being said, I'm not sure if Justice League was neccesarry for that process. It's still nice though.
As for Justice League Dark story, there's a nice prophecy of angel and demon. Jason Blood and Merlin are back too, so if you like them, you will be happy.