Another classic trilogy character will be showing up on Star Wars Rebels with their original voice coming along for the ride.
Following the appearance of Darth Vader voiced by James Earl Jones, Frank Oz will be returning to provide the voice of Yoda in the upcoming January 5th episode “Path of the Jedi”. TV Guide broke the news with a quote from Dave Filoni:
But what a voice it is. Frank Oz, who famously starred as the Yoda (in puppet and computer-generated form) in five of the Star Wars films, returns to the franchise for this episode. “I felt personally to keep Yoda as this disembodied thing it would confuse the audience less,” says executive producer Dave Filoni, who also directed the installment. “I didn’t want you to think Yoda could be teleporting from planet to planet.”
It helped that Filoni was directing an actor so closely associated with one sci-fi’s most beloved characters. “What’s great about Frank, by keeping the voice very present and active, you do feel that it’s a watchfulness and that he’s speaking to you from afar,” he says. “And I didn’t want anyone to think that he had left Dagobah [the planet where Yoda first trains Luke Skywalker]. It was on the outer rim of what we do, but I think we were able to pull it off.”
So Yoda will still be on Dagobah, but someone in the show (Ezra? Kanan?) will hear Yoda speaking to them.