Zach Snyder (director of The Watchmen) is directing an animated The Guardians of Ga’Hoole movie. Guardians of Ga’Hoole is a kids fantasy series by Kathryn Lasky. It’s a Watership Down type tale of anthropomorphic animals (in this case owls) engaged in a battle against evil.
The choice of Director makes me a tiny bit worried (the decision to film a Watchmen movie wasn’t one I entirely agreed with) but this series is totally different so hopefully a good film adaption will compliment the series and bring more readers to it (or Tu-Whit).
Christchurch City Libraries Blog 
Zack Snyder seems to be making a career out of adapting these sorts of things into films. He was behind The 300, and his first film was a remake of Dawn of the Dead.
He’s also working on Ray Bradbury’s “The Illustrated Man” – is nothing sacred?
Well I am not too sure about the (the lack of a better word) fortune of this thing. For starters, if the plotline is changed too much, well it will be another Mario Bros movie. In other words, it will be an epic failure. However, if they keep to the original storyline with all the characters intact, then it should be good sailing from there as long as the thing isn’t too kiddy and not another education fad.
Lots of kids love the books so if he keeps it close to the storyline, like you said, it should still be good but…time will tell I guess