He has been tweeting about it today. He was only supposed to do a couple of issues to begin with. That became 6 and then became twelve which wraps up the origin story.
I haven't seen anything about who the new artist is gonna be. I don't even know who I'd like to see on the book.
I've been enjoying the series and obviously Hitch's art is a huge draw. (No pun intended) I hated him on JLA but his Hawkman art has been great.