User blog comment:B214/Talk About What You Want! 2/@comment-69.60.245.218-20140817211427/@comment-24502975-20140821233624

Tbh volume 7 would be better as a movie, since it's the only battle that doesn't have a direct connection to the Hero-Faction/Old Maou/Qlippoth. Then we can do the volume 8 extra story as an OVA to hype up season 4 of volumes 9 and 10. 11 and 12 as season 5, the extra story from volume 13 (and of course, volume 12.5 Ophis' story) as OVAs, but then we come to a problem as to how to adapt volume 15. We can't go from 14->16 as 15 has important developments in it, so season 6 could be volumes 14, 15 and 16 since 15 isn't that long (and it would be a nice suspense interlude between the reveal of Euclid/Grendel and the epicness that is volume 16). Season 7 as volume 17-18, hell yeah I'm all for it.

The only thing that concerns me is thus far they have opted to write new stories for the OVAs instead of using pre-existing short stories, but that could change after season 3, who knows.