User blog comment:B214/Season 3 confirmed!!!!!!/@comment-1.230.44.32-20140628051923/@comment-1359322-20140628053531

No. Also there's a reason why Rose isn't in that list, she might not even appear. It's not just DxD, majority of LN-based anime, skipped parts of the story and characters. So Rose might not even appear in Season 3.