User blog comment:DeathGodPrayer/Talk About What You Want!/@comment-24053170-20140129060110/@comment-1359322-20140129062254

I don't think DxD will go that direction at least not from what we read till now. This talk about Sora no Otoshimono made me thought of something though.

What if in later part of the story, maybe after the Rizevim incident, a new group of enemy appears, and their are mechanical beings call "Hunters". These "Hunters" can steal things ranging from abilities to weapons and even Sacred Gear.