From a certain point of view, this explains why Star Wars Detours which was set in the same time period was shelved, and why LucasFilm recently sent out form letters to Clone Wars fans that had written in to them.
Will this new series answer the questions we have about the ultimate fate of Ahsoka, Darth Maul, Asajj Ventress, Cad Bane, Hondo Ohnaka and other loose ends from Star Wars: The Clone Wars?
Casting has not been announced yet, but we hope to hear more of James Arnold Taylor, Ashley Ecstein, Matt Lanter, Tom Kane, Dee Bradley Baker, Sam Witmer, Stephen Stanton, Anthony Daniels, and the rest of the talented cast of Star Wars: The Clone Wars.
The action-filled series is set between the events of Episode III and IV -- an era spanning almost two decades never-before explored on-screen. Star Wars Rebels takes place in a time where the Empire is securing its grip on the galaxy and hunting down the last of the Jedi Knights as a fledgling rebellion against the Empire is taking shape. Details about the show are a closely guarded secret at this point
Leading the development of the series is a creative team of exceptional talent. Screenwriter/producer Simon Kinberg (X-Men: First Class, Sherlock Holmes, Mr. & Mrs. Smith) is an executive producer on Star Wars Rebels and will write the premiere episode. He is joined by Dave Filoni as executive producer, who served as supervising director of the Emmy nominated Star Wars: The Clone Wars since 2008. Executive producer Greg Weisman brings with him a wealth of animation experience with credits such as Young Justice, The Spectacular Spider-Man and Gargoyles.
"I couldn't be more excited to explore new corners of the Star Wars universe,” said Kathleen Kennedy, president of Lucasfilm. “I think Star Wars Rebels will capture the look, feel and fun that both kids and their parents love about Star Wars." Source: NEW ANIMATED SERIES STAR WARS REBELS COMING FALL 2014Also StarWars.com has released a video featuring Dave Filoni Joel Aron, and Pablo Hidalgo share some early information about the new series.
The new series already has a facebook page: https://www.facebook.com/starwarsrebels and at time of reporting has 907 likes.