My theory is quite a bit out there and a bit long. Also I’m not that good at This so forgive the for any beginner mistakes. First here’s what I know.
1. Rockwell hacked into the Genesis simulation to turn the “sleepers” into his own personal army of slaves.
2. We are in a space colony/station
3. The Sim and the Station were both made by the Terran Federation
4. The tek we see here is different from the tech seen in any URE based dlc.
5. Nobody knows where Helena or the other Homo Deus are.
Why Rockwell is at the Station:
I believe that when Rockwell landed on earth he must have landed in Terran territory and had access to all the old Terran tek. One of these would be Arat prime where he could upload himself into the simulation and access all of the simulation. He also would have known about the station after going to Arat Prime and entering the simulation. Then the question is how did he get on the station. I believe the station must have some sort of tek similar to the obelisks allowing for the creation of a Rockwell in the station. The thing is that we have no clue what it would be.
The Stations Purpose:
There are only vague references to the “sleepers” and the station in both the 3 URE DLCs and Genesis. We know because of the Genesis countdown that Arat Prime has some direct correlation to the station. We also know because of extinction that Arat prime is on the opposite side of the earth to Sanctuary. I believe this is because Arat Prime is controlled by the Federation and Sanctuary is controlled by the URE.
This is where we have to look at what happened with the Feds and URE during the war that we believed happened. I believe that the war got so bad, so extreme to the point where when the feds noticed elements effect on earth they wanted to just leave earth and find a pure and habitable planet.
The parts I don’t know much about:
1. How corruption spreads Inside the sim.
2. Why the sim and not just the station?
3. Where the homo Deus went.
So that’s it for now! This is my first theory so please forgive me for any big or blatant mistake. I want feedback be it good or bad so please help! Thanks!