When I say darkness I'm referring to the Hive. And Darkness is evil. What else could the darkness be? Destiny's lore and story was created in about a year, if not less. Activision forced Bungie to make cuts so that they could get the game out quicker. I forget his name but one of the guys leading the story creation quit because he couldn't include all his ideas and background that he had been working with. I'm such a rushed amount of time, I doubt Bungie was looking too deep into this.