User blog comment:ZSomji16/The Flash (Season 4), Arrow (Season 6), Legends (Season 3), and Supergirl (Season 3) Villains and Big bads/@comment-24152851-20170327122115/@comment-27700324-20170328124423

Isn't Supernatural not part of this DC universe? Constantine is so that can happen, but don't think Supernatural or Lucifer is part of it.