Star Wars: Episode III: According to The Official Star Wars Website, even more characters which played a role in Attack Of The Clones will be integrated into the Episode III storyline:

The cast of Episode III continues to grow, and two returning characters from Attack of the Clones will reprise their roles for the final installment of the saga.
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Though Trisha Noble's performance as Jobal Naberrie was cut from the theatrical release of Episode II, her scene as Padm

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Brian B.