Please bear in mind I have very little space/astronomy knowledge with any comments or answers but I am curious and quite keen to learn.
Aside from Mars itself as that is such a likely candidate, what would be the next most likely space planet or one of its moons (no asteroids or comets please) for a rock, soil or other sample to be brought back to Earth?
Leaving a "Rover" on the surface (so we are excluding the gas giants sadly unless planned on a gaseous sample) is fine too but the sample should be sent back.
Excluding the planet Mars, which planet or moon "samples" are most likely be returned next?