One of the arcs stars Jedi Master Plo Koon (voiced by James Arnold Taylor), who finds a lost lightsaber while on a mission on a sandstorm-laden planet with a platoon of clone troopers. It's the beginning of a mystery, and one that will make the Jedi question their role in the Clone Wars and the universe itself, according to Filoni.

"The Jedi have been fighting a war with an army that was commissioned by one of their own, Jedi Master Syfo-Dias," he says. "But who was Syfo-Dias, and what happened to him? The dark lord of the Sith has woven an intricate web to ensnare the Jedi, but it is not full-proof and sometimes a small clue, and a bit of chance, can lead to the unraveling of the best-laid plans."