Star Wars Celebration announced yesterday that Dave Filoni will be in attendance at Star Wars Celebration Europe this July. Though that’s not a huge surprise, Filoni will also be debuting two brand-new episodes from Season 3 of Star Wars Rebels. Filoni also teased on Twitter that a Star Wars Legends character is coming to Rebels. He tweeted the spine of Heir To The Empire, which is the first Legends novel to introduce Grand Admiral Thrawn, a character that we heard will be in Star Wars Rebels Season 3.
— Dave Filoni (@dave_filoni) May 28, 2016
Filoni will also be a part of the Rebels panel at Celebration Europe. We should be hearing more details about Celebration Europe in the next few weeks.