During the last panel on the Celebration Stage at Star Wars Celebration Europe II, some Clone Wars news was dropped. Warwick Davis asked Mark Hamill about his voice over career. Which prompted a rendition of Hamill’s infamous Joker from Batman. Davis then asked if he was a fan of Star Wars The Clone Wars. Hamill said that he was and then he played it coy for a moment. Hamill then hinted that he may be in the final episodes, the ones that haven’t aired yet, as a Sith.
Now we all know the rule of two for the Sith. Clearly evident in the last season when Darth Sidious came to collect his former apprentice and his brother. This could mean that there was an apprentice before Count Dooku (Darth Tyranus) and after Darth Maul.
According to Wookiepedia.net “Attaining the rank of Jedi Master after constructing a blue-bladed lightsaber, Sifo-Dyas became a close friend of Master Dooku and the two were often seen in public together. Master Sifo-Dyas was a Jedi quite gifted with precognition” (read more about their friendship here).
My theory is that Master Sifo-Dyas was in league with Darth Sidious (Palpatine). Which is obvious because he commissioned the Clone Army. A fact that was unknown to the Jedi Council. Perhaps he was duped by Dooku, but Hamill’s statement could prove otherwise. I believe that Mark Hamill will voice Master Sifo-Dyas and we will learn about yet another Sith apprentice/ master.
There was no official confirmation from Lucasfilm, but it seems to add all up.
This clip appeared online shortly after the news of The Clone Wars having officially ended.