Sounded good. But I have to agree DaMonz regarding the timpani. It seems like there isn't enough of a base line to support it, with just the pizzicato strings--like its glaring. Maybe lowering the volume to make it more like a soft rumbling--more like distant thunder than the explosive quality it has now.
Also, the vocal samples you used struck me as midi-esque in quality. But other than that it was good. I like the twist on the melody at the end, especially. You could almost use it as a segue into the "Faraway Times" theme. But that's just speculation on my part. In any case, many kudos to you.