Here is a list of all the potential places: I want to point out that my best guess for the slingshots location is on Earth. While I would think mercury or Venus would be good locations as they are closer to the sun, I am pretty sure bungie would use Earth as the owner of the slingshot because that is where they plan on taking over. However I could be wrong. So if there is somewhere in the solar system that you think the sling shot may lie, than post below. Bungie Studios, Earth Somewhere in Venus City shown in E3 trailer, mercury. Dust Palace, Mars. More places to come.