He clarified that he leves on good terms with DC, and that leaving was his decision, saying that he's said what he needed to say about the characters. He said that he doesn't have anything else on tap with DC Comics yet, but wouldn't be opposed to it. He told a fan that he'd love to write Batman, but obviously Scott Snyder isn't going anywhere for the time being.
You can see his full post at the link above, or embedded below.
Eh, I'm tired of waiting for someone to make the announcement for me, so let me dump this here on a Friday night:
I'm leaving New Guardians as of issue 40 - my decision, and one I (and DC) have known about since about last April.
It's not because I don't like writing the book (I do) or because I've had any kind of DC falling out (I haven't) - basically, I've written about four hundred pages of New Guardians, and I've told the story I wanted to tell, so I figured it'd be a good time to wrap up this stage of Kyle's story and for me to do something else.
I took New Guardians because I wanted a challenge - I'd never written a cosmic book, not anything so sci fi, and I wanted to stretch. And it's been great. I loved working with my editors, with Brad Walker and the rest of the artistic team. And I think we put out a good book.
No book is ever perfect, but I think this is probably the most consistently good work for hire book that I've done. I've gotten to tell the stories I wanted to tell, the way I wanted to tell them. Their weaknesses are mine, and that's not always the case for non creator owned books.
And I enjoyed working with the Four (Eventually) Five Corpsmen, the writer of the various books. It's been about a satisfying a working experience as I can imagine having.
Thanks to DC for letting me write the book and all the fans for reading it.
(And no, I'm not saying what happens to the book after me. You folks are going to need to wait for that)
ComicBook.com has reached out to DC Comics for a comment; if one is forthcoming, we will update this story.