Because of course it does. USA Today has the scoop – and a clip:
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 [Supervising director Dave] 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.”
Filoni also discusses why Ahsoka did what she did in the finale, and his advice for J.J. Abrams. Still no word on where any of the ‘bonus content’ will air, though.