User blog comment:Omega64/Boosted Gear Sub-Species Ideas/@comment-3965848-20161121110418

I'd image that both Issei and Vali would get new armors and change from crimson and silver to ruby and platinum respectively, Ruby Dragon Emperor and Platinum Dragon Emperor.

My guess is that Issei's new armor will take on a king form, based on his desire to be a King of his peerage/harem.