User blog comment:FTWinchester/Darkness as the overall Big Bad/@comment-9249716-20160126223945/@comment-34326521-20160127174038

The way God is portrayed in the latest seasons is more in line with the Bible than in the earlier seasons. In other words, Metatron's reveal of The Darkness as his sister and what he had to sacrifice to be able to create the Supernatural universe makes sense, if you take the Bible into consideration.