Here's what's next.
Juno. In 2016, NASA's Juno spacecraft will reveal new information about how Jupiter formed and evolved into the planet we see today. Juno will be able to sense how the planet is arranged on the inside, and how its deep atmosphere moves. The mission should finally tell us if the planet has a solid core, how deeply rooted the bands and storms are, and how the planet's powerful auroras are generated.
Europa Explorer. Both NASA and ESA are studying the possibility of sending spacecraft to orbit Europa and Ganymede, on missions to learn whether these icy moons contain oceans where life could arise.