User blog comment:B214/Volume 21 info & spoilers/@comment-95.90.227.221-20160416005245/@comment-95.90.227.221-20160416110155

I think that of the end of the Series Vali will be the new Demon King and Issei will be the new The True Red/Crimson Dragon God Emperor or DxD (Dragon of Dragons) and I think they will find a Way to bring all the other back, because if not the World is a little srewed, but i am Positive that Issei will be a complete Dragon/Dragon God and wil be stronger or equal to Vali. Maybe he will have etarnal Power of infintie. But I really hope he will become a complete Dragon and will be the strongest Dragon that exist. Vali can be the most powerful Lucifer but at the End for me Issei must become the strongest ( he had so a fucking hard way, so he deserve it.)