There is a press conference at Star Wars Celebration for Star Wars Rebels and it’s just been revealed that season 4 will only consist of 15 episodes. It will be longer than season 1 but shorter than season 2 and 3. So we can expect things to go fast in this final season!
#StarWarsRebels season four will consist of 15 episodes, rather than the usual 22.
— Ion Cannon Podcast (@IonCannonCast) 15 avril 2017