I have no idea who is adapting the anime, but it will probably run till volume 5, let us hope that they do not try to cram everything into a one-cour series (12 or 13 episodes). The anime is scheduled to come out this fall and is being produced by Aniplex.
UPDATE: the anime is being adapted A-1 Pictures.
here’s the trailer:
(It’s in ENGRISH :D)
here’s the link:
Now all we need to do is wait for Saijaku Bahamut to be animated to satisfy our Chinese cartoon hunger.