It feels that the current overarching narrative may be taking inspiration from Tolkien’s “The Silmarillion”. This would mean further that the Witness maybe Melkor or Ungoliant. That would leave room for two more big bads in Morgoth and Sauron. We could even be entering the time with the black numenoreans with the deceit by Sauron against the Valar. Or maybe I am just a huge nerd and the fight of light vs dark is just similar across most franchises. Edit - this could also have been during the time of the great fall. It would be cool if Nezarec was actually Ungoliant and The Witness was Melkor.