I think that this is a side of Jason that alot of folks have been waiting to see, namely that he's finally coming to grips with his zombie brain. Aside from that, this isn't going to be the last time the DCnU throws stuff like this at the readers. if i were a fly on the wall during the planning sessions, I bet I would overhear something like this.

"Ok, this is what we want to be doing with these characters, and we want it hot. All within the first year hot!"

"But there's alot of deep history here, we can't just throw it out like you want."

"Yes you can, it's called Flashbacks. We'll fill in the blanks as we can think of good ideas to fill into them. In the meantime, who is it that signs your checks again?"