User blog comment:B214/Azazel Cup discussion center/@comment-78.88.30.133-20170219215142/@comment-31137559-20170220174020

Yeah. If it's Ishibumi, he can change around some myths. But the world was just threatened by 666. What could trump that? They would have been better suited for the fourth arc. Rizevim could have freed them and enhanced them with the Holy Grail. Tell me you think the Malebranche appearing is better than a tournament with gods and god-class beings competing.

We can't take everything Ishibumi says at face value. He has incorporated a lot of mythologies into DxD. He has a bunch of ideas running around in his brain. And he knows he can't put them all in DxD. He might save them for a sequel series. The only purpose thwy would serve is that people feel the need for another villain. It would be a downgrade from Trihexa.