Back apparently from the dead is the idea of Mars Sample Return. As The Space Review explains:

You can be forgiven if you missed it, because NASA was careful not to use the words “Mars Sample Return” in their press release. Instead, they announced that they are going to build another rover, based on the successful Curiosity design and using some spare parts manufactured for Curiosity, to be launched in 2020. In the official press release, NASA stated that the instrument suite is still to be determined. But make no mistake, this is the first step toward sample return, and in many ways represents a major reversal for the Obama Administration.

The entire article is well worth a read to understand what’s going on with a series of missions that may well eventually cost $5 billion+