User blog comment:Rafe Adler/"The Rising Son" Discussion/@comment-1031724-20171020025423/@comment-10889355-20171020063227

Yeah, I think they'll be released. Maybe on the second half of the season or maybe they'll do it by the end of the season (a la Castiel in Season 6 with the Leviathans). I don't know how they'll do it in terms of animation and stuff though.

Dagon in The British Invasion did, I think?