It’s no secret that Dave Filoni and the rest of the TCW crew had more stories to tell before the show got the axe following Disney’s purchase of Lucasfilm. Several pieces of concept art were revealed as treats for fans last year, and some thus-far-untold stories found their outlet in comic, story reel, and novel form.
All that’s known about the “Bad Batch” arc is that it would focus on Echo (previously believed dead), Rex, and other clone troopers. And that’s it. Perhaps more information will be unveiled at Star Wars Celebration in April?