User blog comment:B214/New anime 2017 discussion blog/@comment-112.209.54.190-20161229055102/@comment-9595671-20161229060718

There's a new anime atleast, but it hasn't been stated to be a 4th season yet. That's just what most people have a feeling it will be.

For one example of a non-Season 4, what it could actually be is an anime adaption of DxD's prequel series, Slash/Dog, instead.