I thought it was a solid enough issue for something that is supposed to be a prelude to a new run. It is also clear as to why Rucka agreed to take on the writing chores. He is going to be able to reframe Diana all the way back to her origin. During his first run, he argued that he didn't feel that he needed to deal with existing continuity, as he felt that every new writer's run is in effect a new character. Now, he doesn't need to really be beholding to anyone.
I do have to reiterate that I don't feel Sharp is the right artist for Rucka. As pretty and detailed as the art is, it just doesn't have a sense of forward motion to it. And Rucka needs an artist who will drive the story. The action in the conflict with the minotaur, Cerberus, and the centaur was pretty much illegible.