Star Wars Rebels is barreling towards the end of season three of their animated series, and the crew of the Ghost have some good news: they (the surviing ones anyway) will be back for a fourth season. Little additional detail has been revealed about the fourth season (they would not want to spoil the ending of the third season) aside that it will be returning in the Fall and that production on the upcoming season has already started.
Disney XD's Marc Buhaj had this to say about the upcoming fourth season:
"The team behind Star Wars Rebels delivers epic storytelling that has captivated fans of all ages across the globe. We’re excited to continue sharing the journey of these fan-favorite rebels with our audience in the fall."
In the meantime, you can catch episode 18 of the third season, Secret Cargo, this Saturday on Disney XD. Rebels season three should be wrapping up March 25 with the two-part Zero Hour season finale.