It's a little reminiscent of Vermithrax, from "Dragonslayer." Yes?
I like the powerful musculature in the neck, which has a dino feel.
The thing is, "The Hobbit" was written with a lighter tone than the LOTR trilogy, much like a children's tale. As such, I'm more able to overlook talking spiders and dragons. But I dread seeing this in a film, after the epic success of the more subdued Peter Jackson translation. I hated "Dragonheart" for this reason, among others. And unfortunately, Smaug has an awful lot of dialogue, some of it rather interesting.