User blog comment:Xhatefate/DxD Updates~/@comment-25136646-20140711160426

Say what do you guys think about the final battle? This is what I think. Perhaps 666 will kill Rizevim after 666 refuses to obey him or something like that.

Have you guys watched Beyblade Metal Fury? The Legendary Bladers fight against Rago who owns the God of Destruction Nemesis. When it's revealed Némésis is too powerful, the main protagonist Gingka fights in the final battle against Némésis.

What if something similar happens? Perhaps the 13 Longinus possessors will fight 666 and when 666 will become too powerful, Issei will be in the final battle against 666 since he has the power of Great Red who is the only being that can match 666? What do you guys think?