User blog comment:Swordbirth18/Possibilities for highschool dxd season 4/@comment-1359322-20160708113030/@comment-27083298-20160708145637

This is what my friend wrote me when I ask him do you believe we'll get season 4

I think season 4 might be possible. Here is the article from Ishibumi sensei blog.

http://ishibumi.exblog.jp/23919063/

And in that article, he said

"来年はデビュー10周年なので展開したいものが結構あります. Ｄ×Ｄをはじめ、SLASHDOGに関してもそうですが、新たな企画を編集さんとの打ち合わせ等で進めていく予定です. この間、打ち合わせしたばかりですが、近日中にももう一度来年に向けての打ち合わせに行きます. 実現できるかどうかは、私ががんばらないとどうにもならんのですが……突き進むしかないでしょう. "

This sentence means…

"Next year(it means this year) is the 10th anniversary of my debut. So, I am planning to do something new about not only High School D×D but also SlashDog. I will make arrangements for it with my editor. Actually, I made arrangements once not long ago, but I have to go to another conference for the plan in a few days. whether it comes true or not depends on how much effort I put into it, but I'll go headlong into it to make it come true."

He didn't say any details about what "a plan about something new" is, but it could be season 4.

Also, in this article… http://ishibumi.exblog.jp/24182620/

He said

"他にもいろいろと新たな試みをしておりまして、今年中にはお出しできるものもあるかなーと. できなかったら申し訳ございません. "

It means that maybe he can announce about some news of "something new" in this year. Also he said "I have to say sorry if I couldn't do that".

So maybe there will be an announcement someday.