We know where it comes from at the following link.
We can only guess at what the process has been like for Bungie in the years they’ve been working on Destiny. There’s sure to be a lot of stories that would generate sympathy in critical circles and further devotion among the fans. But there are no doubt also troubling things we could learn from the sausage making, and plenty enough of it to put us off our games…for a while, at least. For now, there’s just no stopping; bounties and heroics won’t clear themselves, and there’s always more Hive in the cave.