The set is listed to include "15 action-packed episodes," which means this would include the 13 episodes of season one proper, as well as the mini-movie that kicked of the series "Spark of Rebellion."
LucasFilm lists many bonus features for the two formats.
Bonus Features: Blu-ray:
- Rebels Infiltrates Star Wars Celebration (Exclusive to Blu-ray)
- Season One shorts: “The Machine in the Ghost,” “Art Attack,” “Entanglement,” “Property of Ezra Bridger”
- All DVD Bonus (see below)
- Rebels Recon: 14 behind-the-scenes featurettes
- Star Wars Rebels – The Ultimate Guide
- Star Wars Rebels Season Two – A Look Ahead