When caves eventually come online, what missions are they considering for them?

They're considering things like AI Combat, Missing Persons (like someone's gone down into a cave and not come back out, and the Player has to find them), Mining - or at least "harvestables" because these are things that they're still looking into. There'll be other things, such as whether the cave is inhabited or uninhabited, whether it has been explored or is currently being explored, and all of the opportunities that that brings with it. A lot of it is traversal and exploration, and things that tie into that, so it should be thought of as being like spelunking. Jared adds that we'll learn more about caves as they get closer to their implementation, which we should hear about through ISC.