I'm not very far into the game, I think, and I'm sure I'll get real answers to my questions later on, but I still want to write this down now so I can come back to it later and see how off-base/correct I was. Also, don't tell me if I guessed correctly! I want to learn things on my own.
There are spoilers past this point, mostly for the prologue and documents you can find in the starting area. Read at your own risk.
( Read more... )

It looks like efforts to reconstitute the slides were unsuccessful, but what if she managed to create a new slide outright? In the vision Dylan saw of her before fighting the Artist, Jesse explained that she was going to use the Slide Projector to go into another world and fix the problems caused by the Hiss (and other things).
That can't happen if she doesn't have a usable slide, so I'm guessing at some point she was able to create one. And then she used the Slide Projector and went through to another world, where she's…fixing faults, or something, at the cost of her own memories. I've only seen the first vision. I don't have enough information to determine what she's really doing.
And something about this is causing the Patterning. Creating the slide? Using the Slide Projector? It came from a slide, like Polaris and the Hiss?
The only problem with this idea is that the Patterning came from outside the Oldest House, and there's been no communication with the outside world for the past seven years. Some part of the outside world knew that the AWE was going to happen – per Barry's emails in Alan Wake 2, the Blessed Organization knew that something was going to happen a few years in the future from 2023.
Even after the ARG, and knowing that the Blessed have been creating Altered Items, I don't actually think they're responsible for the Patterning. It doesn't quite seem to be their MO to cause Altered World Events.
I still think Jesse is somehow responsible for the Patterning. Or she
is the Pattern, maybe. That would possibly explain why the Board referred to her as the Final Boss. She's become a Resonant Entity or something similar. She did basically become the new Polaris at the end of the previous game, so that wouldn't surprise me too much.