Alright, so here's my take on/additions to that reddit dude's theory...
What we basically know for sure:
- The antagonists' goal this season is to "kill Dolores."
- Antagonist One = Serac (Vincent Cassel's character)
- Antagonist Two = Rehoboam (aka, "The System" of A.I. social control, majority managed/owned by Serac)
- After twenty years of history having an "author" (Rehoboam), and Rehoboam having cured catastrophes, wars, and "divergences" with its algorithm, it has suddenly recognized a new divergence/anomaly: Dolores, arriving to the real world. Ironically, under this system, Dolores, an escaped host, is the only sentient being with true free will, something Rohaboam apparently didn't foresee or plan for.
So, with Dolores now on the map, and causing divergences (which we saw graphically represented a few times in this week's episode), my belief is that the plan to eliminate Dolores is two-fold...
Plan A) Serac enlists Maeve to hunt down and kill Dolores (from the trailer, in an upcoming episode). Perhaps this is the practical, more tangible approach, one Serac can manage and has control over.
Blan B) The more covert plan, I believe - one that Serac himself may not even be aware of - is Rehoboam using Caleb to lure and gain the trust of Dolores, in much the same way Dolores lured and gained the trust of Liam (John Gallagher).
As mentioned in the reddit guess:
- Rehoboam is responsible for Caleb not getting the job he applied for (along with all the other implied recent jobs Caleb has applied for). Yes, I believe that A.I. calls are standard in the future, but seeing as Rehoboam is ultimately in charge of job hunts (and much more, via Incite), it makes perfect sense that Rehoboam is manipulating Caleb's job hunt, down to the A.I. phone call. Helping clients find their "path" is literally one of Rehoboam's prime (and public) directives, but it seems even more blatant/sinister in this instance.
- We also know that the Rico app is ultimately under the control of Rehoboam. The minute Caleb gets the no-hire call, he goes straight to the Rico app and takes the Dolores job. To me, that feels exactly like a one-two punch to manipulate Caleb into ultimately meeting Dolores.
- Story-wise, Dolores is then told by Liam's security guy, Conells (Tommy Flanagan), that "the system will find you."
- The very next sequence then results in Caleb "finding" Dolores.
To me, that's all a little too much coincidence, and feels like the exact right twist - that Rehoboam is manipulating Caleb in attempt to ultimately take down Dolores. Maybe Rehoboam even needs something from Dolores first, hence the long con. There's also seemingly something unique or special about Caleb that might be the reason Rehoboam chose him. Maybe it's as simple as Caleb's empathy, but my bet is that it has something more to do with Caleb's history/mysterious "already been shot in the head" comment.
From there, as also noted in the reddit guess, Dolores then must come to grips with the fact that Rehoboam is the superior "species," has been controlling Caleb/the human race all along, and most importantly, that machines can be just as bad as the worst humans. Right now, we can see Dolores getting a little too cocky, and I think she's in for a rude awakening. That said, she'll then fight for hosts AND humans (season four? second half of this season?) and that will be her redemption arc.
At least something along those general lines.
Again, if true, there will surely be myriad more details, context, and surprises, but if I had to bet, that's the basic arc I'm putting my money on.
