I did a search, and nothing came up, so I guess I'll make this thread.
This is a very odd premise.
Deltora Quest is a pretty awesome book series, but I never thought it would be anything but a book series. Anime never even crossed my mind. Being the fan of the series, I'll check it out, provided I can find it when it's released.
Deltora Quest Wiki: http://en.wikipedia.org/wiki/Deltora_Quest
Deltora Quest Anime Wiki: http://en.wikipedia.org/wiki/Deltora_Quest_%28anime%29
Deltora Quest Anime Official Site: http://www.deltoraquest.jp/
I was bored, so I took a look at some of the voice actors, and found some minors connections to One Piece:
The other revealed VAs are:
-Voice Actor info courtesy of ANN-