Yagi Norihero... I've admired his work since Angel Densetsu, but for a guy who's been around so long, I'm a little surprised he doesn't have more manga under his name. Then again, Angel Densetsu. Ariadne, and Claymore all had fairly lengthy runs.
But, I digress. Don't see why this oneshot wouldn't work for a Claymore-esque publication run. All the exposition dump about divine knights was a little annoying initially, but other than that, it seems like something people could get into.