OK, let's try another exercise decoding/demystifying the movie Dune (1984) since we are due for a remake - coming 18th December 2020.
From 1984. That's 36 years ago. Young adults who saw the movie in its theatrical release are reaching retirement age now. Any predictions from it are decades past their sell-by date.
The starlink symbolism is similar to this logo in Dune - the world to be divided after 2023 based on extreme weather conditions.
Science fiction settings where planets have a single climate or biome are a
longstanding trope of science fiction. Consider Star Wars with its desert planet (Tattooine), ice planet (Hoth), swamp planet (Dagobah), forest moon (Endor), and so forth (many more in the prequel trilogy).
The reason for this is that Earth itself is divided into a wide variety of climates with different biomes and weather systems. It came that way. No one had to do any dividing. The single-biome planets in SF are just an easy way of making their settings more distinctive and "alien."
Arrakis/Dune = the Middle East - to be burnt to a cinder leaving only sand!
But that doesn't happen. In fact the opposite happens: Arrakis is a scorched empty wilderness until Paul restores water to it.
Caladan = the waterworld of the flooded west following the global flood
Caladan was always a water world, and the Atreides who lived there liked it that way. It symbolizes how alien to them the desert planet they're moving to will be. When Paul restores rain and seas to Arrakis, it shows he and the planet are now in harmony again. There was no flood on Caladan, and there is no destructive flood on Arrakis.
When the middle east ceases to trade spices via the silk road, say, then it will become a scorched inhospitable desert post-2023
In that scene, elite military forces harvesting spice have been attacked by insurgent natives. It's the natives doing the burning, to drive out the Imperial occupiers. Your description is the opposite of what the scene is depicting.
The 3rd/4th world that the elite control is the military/concentration camps that contain virus patients and where experiments take place
In that first image, the guy in the chair with the scarred face is the boss. He's in charge. All of the other people in that frame and in the next two frames work for him and follow his orders. He is not a prisoner.
The 4th world is that of The Emperor = The Black Pope (has several HQs) - based on the god Saturn who has rings around it. In the movie this area has a similar name to Kaipur belt, i.e. the ice wall at the edge of the flat earth since 3D planets and icy kaipur objects at the edge of the solar system are fictional, and here is a representation of the real edge of the closed dome system that is our earth: the ice wall.
The wall in the frame is on Arrakis, the desert planet. It's not an ice wall, because, hello, desert planet.
Also, the earth has no closed dome. We know this because we can see the changing phases of Venus as it circles the sun.
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