User blog comment:B214/Season 3 confirmed!!!!!!/@comment-24.104.16.162-20150329163637/@comment-3965848-20150329202746

That all depends on how many kids he will have with each of the girls in his harem and how many girls will be in the harem, it's also unknown if it's still growing considering all the potential members (Kuroka, Kunou, kiyome and Elmenhilde).

On that subject I think that if Issei and Akeno have a kid, it would be a girl and named Shuri after her mother. That's just my guess.