User blog comment:Crimson and Darkness/Shin DxD 3 discussion/@comment-78.181.218.187-20190821075527/@comment-10330822-20190822234812

Quite honestly, it has nothing to do with Issei pseudo-god status. Sirzechs is the one who made the pitch for Issei to become "Satan", and it was purely because he wanted Issei to inherit the "Crimson Satan" title. But the irony is that Issei could have the title regardless of whether he was "Satan", because not even Sirzechs is "Satan" after all, he is "Lucifer". So honestly, there is no real arguement to make Issei "Satan", especially when "Asmodeus" is far more fitting.

The only possible arguement would be the whole Satan's manifestation as a dragon, and Issei is a dragon. Also, Rizevim coined Issei as "Satan" and the kanji was "Devil Dragon King", basically "DxD King". But still, he could just mix those titles together and be "Crimson Satan" with the kanji of "Crimson Devil Dragon King" and it would be just as fitting really if he were Asmodeus.

Beelzebub was trying to solve the New Satan Faction vs. Old Satan Faction issue, and to his credit. After all, the remainders of the Old Satan Faction can't really rebel when their "kings" are already sitting on the seats of the Satans.

However, there are a lot of things that need to happen for Asmodeus to have a filled seat. You need to find an Asmodeus, one that isn't hostile, and one that can be trusted to take the seat. Essentially, you need to re-introduce Ingvild, which is what they already did.