At the beginning of this month, NASA announced that it intends to return to Mars in 2020 with a new large robotic rover closely modelled on Curiousity.
This will bring the number of Mars probes up to seven: Curiousity itself, the earlier Opportunity rover; the 2013 launch of the Mars Atmosphere and Volatile EvolutioN (MAVEN) orbiter; the Insight probe mission, which will take the first look into the deep interior of Mars; and participation in ESA’s 2016 and 2018 ExoMars missions.
It’s been announced that the future rover will be built using the established platform that was used to transport Curiousity down to the planets surface, probably including a sky crane. Use of the proven delivery system should (in theory) reduce costs and free up funding for more scientific instruments on the Rover.
The 2020 mission will constitute another step toward being responsive to high-priority science goals and the president’s challenge of sending humans to Mars orbit in the 2030s.