Jackie Chan as the Monkey.
Lucy Liu as the snake.
And finally, Dustin Hoffman (not Martin Sheen, my mistake!) as the Master
This is the baddest bad guy that ever lived in an animated film.
Oh, strangely enough, the trailers are still not ready on the official website. I realised that they were actually out about 3 days ago on every other website that you can think off except the official Kung Fu Panda website. Then somehow, the trailers were removed for unknown reasons from most of the major sites.
But I managed to track them down. Here's the main trailer.
This is another one with Jack Black talking too much, & with too little animation.