The run continues it seems:
http://www.cbr.com/dan-didio-jim-lee...oes-interview/DiDio: That one’s been under way, we just didn’t want to announce it too far in advance because we knew how long the first one took. [Laughs]
But Arkham Asylum 2 is something Grant’s been talking to us about for a while. It’s a story he’s been wanting to tell. He never thought he would, but he finally felt he got the right spin for it. It really is more of an extension of his Batman run. It’s not something that stands apart from the line — it actually makes sense if you follow the continuity he was creating with Batman and Damian back to #666. I think that’s what makes it a lot of fun, because it really is something he has a lot of pride in, and a lot of interest to still go out there and tell more stories of Batman. We’ll always be excited to publish it.