You don't buy that theory?? You clearly haven't read up on any of Bungie's last minute issues & changes before the game released. The grimoire cards were actually written 7 months before destiny was released. Joe (the lead writer) left Bungie approx a year before destiny came out & bungie had to pick up the pieces & salvage the mess of a story that they had on their hands. If you do a little digging, you'll find out that the grimoire lore was in a basic form from the notes Joe left behind, but Bungie hired a writer solely for the purpose of writing the grimoire cards because they were out of time and couldn't re-create cutscenes explaining the story/lore, so the whole grimoire concept was deemed the quickest/best way to tell the back story without delaying the game. This isn't a theory, it's a fact. If you do a little research and go back 8-9 months before Sept.9, 2014 and search the job postings Bungie created, you'd easily find that a "writing position for the series lore" was posted, and the writer who got the grimoire writing job came on board and finished all of the pre-game grimoire lore 7 months before the retail game came out. New grimoire cards are created from this point on to continue their "idea" of story telling, but it literally was a last minute patch job to salvage the story and stick to their deadline. And each DLC (don't call them expansions - they barely have enough recycled content to even be called dlc) so far has been an attempt to flesh out their universe, but as of this point, they keep messing it up (and they even acknowledge this in interviews) & don't expand on much of anything. When the 1st comet expansion hits, we'll see a more fleshed out story, but until then, we're getting recycled environments & content that was in the game as early as the Alpha. The only difference is that Eris was created as a new asset after the game was released, everything else was reworked & salvaged from the original storyline that was scrapped after Joe S. left. Don't believe that? you can even hear it direct from DeeJ when he constantly comments about how we "shouldn't buy into leaked content since all those assets are placeholders". They don't come out and say it, but if you use your brain, you can see whenever leaked content surfaces, he chooses his words carefully, and it's usually repeating the phrases "placeholders", "story will most likely change", and "don't believe everything you see that was leaked". They can't admit it, but this game was dismantled and reworked less than a year before release & the grimoire lore is one of the MANY things used to patch the non-existent story. So no, it wasn't the original "envisioned" idea for the game, but it's what we got and what we have to deal with moving forward.