Nessus is a world outside of our own Solar System, and in Destiny 2 concept art we can see a lot of what the planet has to offer. Nessus is said to be located in the Cabal home system, though it looks like the Vex have been doing their thing on the planet for quite some time. It’s not confirmed that Nessus is the Cabal homeworld, but the fact that the Vex are there is enough to show us why the Cabal and the Vex don’t get on.
the above concept art shows Nessus in a light we’re not used to, it’s beautiful, lush, and green. When you think of the Cabal you think of a world covered in militarised cities and factories producing weapons of all kinds. Again, Nessus is not said to be the Cabal homeworld so while I wasn’t expecting something like that, I definitely wasn’t expecting a world with lush greenery similar to Earth. However, if the Cabal are aware of the Traveller then they must have seen influence from its Light before, meaning Nessus may once have been a world blessed by the Traveller’s Light, which would make sense given that the Vex are now mining it for everything it’s worth.
This piece of concept art gives us a better idea of what Nessus is like. As you fly over the world you can see large polygonal shapes missing from the surface, but these are actually holes leading deeper into the planet. What has happened with Nessus is an almost complete transformation by the Vex into a sort of Vex planet. In the Inverted Spire Strike we delve deep into the planet’s core and see the horrible machines kept there, as well as a lot of Vex Milk. I think Nessus shows us what the Vex aim to do with pretty much every planet they encounter, turn it into a Vex machine that they can then use for furthering their presence in the universe.
Now this image above is a bit of a stretch but hear me out. What if the object being swallowed by the colossal ship above is one that has been converted by the Vex? I’m not super familiar with what the process of converting a planet as the Vex is, but I imagine that a race of machines would like to create more machines and spread everywhere. If you think about the Vex as bacteria, then it stands to reason that with everything they build by consuming the world they must be creating new elements through various processes. What if this huge ship then takes what is left of a planet after the Vex are done with it and processes it into dust, or basic elements in space? Everything that exists in the universe was once base elements floating around in space, which then came together thanks to gravity to form the systems we have today. There are still huge pillars of this dust and collection of elements travelling through the universe today, but what if all that is being created by the Vex as part of their lifecycle? I know all of this is pretty far-fetched, but we know the Vex worship some unholy stuff, so I think that this is all a definite possibility.
Image Source: GameRant