So I began thinking about those Pyramid ships at the end of the credits, and had a strange theory come to mind.
There have been many links to these ships and the “Darkness”. The most common theory being thrown around is that these ships we see are, in fact, the Darkness, and the Darkness itself isn’t some entity, but instead a species of itself. So I began to think, do the Darkness relate to the Deep?
We see the term “The Deep” being talked about a lot in the Books of Sorrow (will be referring to this as the BoS from now on, to make it easier), but there has been no real hint as to what it is, other than the entity from which Oryx took his power, and which ultimately made him the Taken King. However, we see another term as well: “The Sky”. We know that the Sky relates to the Traveller, or so we think.
I believe that the Traveller is not actually “the Sky”, but merely one of many vessels sent out to bestow the power of the Sky on species within the Cosmos. “The Sky” itself is a separate entity, one of ultimate power, much like The Deep.
So, what if these pyramid ships are to the Deep what the Travellers are to the Sky? They go to a planet, and bestow power to the native species. These species that have gained this power then become the Darkness, which serve the Deep.
There is, however, a fundamental difference between the Sky and the Deep. The Sky bestows power on a species, and grants them power. It gives it. However, we learn in the BoS that the Deep doesn’t work that way. They do not simply give out their power. Instead, if a species wants the power, they must take it. Only then will they have truly earned the right to use it.
So, to come back to my main point, these Pyramid ships are not just “ships”. They are instead Travellers for the Deep. And now that we have activated our Traveller again, they have awakened also, and they will begin to grow an army of servants to the Deep, ones which will be worse than any we have encountered before.