If you consider a character official announcement a spoilers, please do not continue reading below. A poster from Toys R Us let this news slip a few days ago, but it did not include the other exciting news.
It is now officially confirmed that Saw Gerrera will appear in Star Wars Rebels season. Forrest Whitaker will reprise his role, and the character will be in the next episode of Star Wars Rebels "Ghosts of Geonosis," which will air on January 7, 2017.
The LucasFilm video featured at EW, is embedded below.
Read more at "See Rogue One's Saw Gerrera return in animated Star Wars: Rebels"