You have seriously over thought this, and have done very little research into Destiny's development. That being said, the evidence and other information available or found by clever game players, tends to lean the argument towards Destiny being butchered story wise for a few possible reasons. Game play clips and videos for early and i mean really early game testers shows the game to be a lot more expansive in story and content. There has been evidence showing that Mercury and Saturn where supposed to be in the base game but where cut for some unknown reason. There was also a cut scene showing the Queens brother down on earth confronting your guardian. This evidence suggests that something seriously went wrong in the development in the game. Adding to this was the sudden departure of the lead writer and other key staff members at the tail end of the development cycle for the game. Basically there is no hidden story just a incomplete butchered one that will probably be sold to us piece by piece in various DLC content packs. That being said I like destiny. It is a good game with amazingly beautiful worlds. The game play mechanics are fluid and well done and it has the potential the be a franchise worth a lot of people time and money. The sound track is awesome and there are moments when the true potential of the story shines through. Overall I hope they fix the story so this game can be what people expect and want out of a triple A title.