User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-24468758-20141122071505/@comment-25610633-20141122092622

Seeing as how his body is now made up of two of the most powerful dragons that have ever existed and all of his recent dragon related powerups (dragonification and now dragon wings on his base form), and also how Crom Cruach sees Issei as the crucial key of the safeguard of the future of the Dragons species, this theory actually seems quite probable (in the distant future that is).