Location Possibly Near Saturn?

Not sure if this has already been speculated on, but I have notice that, early in the recently released sneak peek of the full trailer, at one point the "camera" is looking up (from the ground presumably) at a rover and there is a planet in very close proximity to the host planet.... it resembles Saturn... appears very large and has rings. Perhaps the planet they have traveled to is actually not so far away.... perhaps it's a moon moon belonging to one our solar systems larger planets. Saturn does actually have a satellite named Prometheus, though I'm sure it has nothing to do with the host planet... it looks more like an asteroid. It could perhaps be Titan... Titan has been speculated to possibly have the capacity to sustain life.