User blog comment:Jopjopjop/High School DxD BorN episode 3 review/@comment-149.88.55.35-20150418162228/@comment-1359322-20150418162718

Because this is meant to be the last season, so they decide to mix in Volume 5 to Volume 11. They'll skip all the Rating Games and reveal the Hero Faction in Episode 6 and straight enter Volume 11 as the last episode.

Is what i like to say. Oh well, Season 3 will mix in events of Volume 7 into the plot to blend the story together, we'll still get the Rating Game and Juggernaut.