Oh, well if you were looking to improve upon the original design, I would be happy to point out the anatomical errors.
For one, creatures with muscular wings (Birds, bats, etc. as oppossed to the fan-type wings of insects) Require different bone structure. If you look at enough dragon pictures you will notice that the chest has an odd sort of protrution, and that the pectorals are slanted (similar to the waist on that model) This is because they have an extra bone, or cartelage that provides for the range of movement required for wing-flapping.
Furthermore, but a lesser complaint, the wings being below the arm, in the lower-shoulder area would actually inhibit the movement of the arm, and would also require a second set of pectoral muscles, these stretching more along the side of the body as well. The pectorals are what allows such a limb to move front to back, the shoulder muscles are what allow it to move left and right, and up and down.
Also, the picture is "perching" at the moment, which means a few vitally different things than when they are simply standing. The hips are rotated a bit more backwards, allowing the body to be more upright. That's fine for the pose, but for animation purposes, if you want it to look convincing, you'll want to pose the dragon in a more horizontal pose (like you would see a bear, for instance, except the tail would allow the dragon to stand without actually placing his feet on the ground. In fact, a bear is a very good reference to use for the way it would move, if you combine it with, say, a cats movement)
Also, if the wings are to provide any real flight, more than just a somewhat guided fall, they will need to ultimately attach the wing membrane to the back, as opposed to the tricept area like in the picture. Attaching it as such would mean the creature would have more control, and a greater area for catching the air, not to mention a larger percentage of the membrane would be tightly held down. As it stands, the wing would flop quite a bit while trying to fly.
The movie dragonheart is indeed a great reference for those type of dragons.
And a fantastical animal still needs to have realistic elements in order to be convincing. As it is, the character seems like it has the bodystructure of a centaur, and animal with NO extra balance with the tail, and only deterous limbs on it's upper torso, instead of limbs intended for mobility.
Who am I? I'm someone who knows better, and simply stating something like I did should not cause people to get all miffed and offended. I was not insulting the modeller, I was in fact stating that I did not blame them for the issue, unless they were the one who did the concept art. If they are the artist, then I am pointing out an issue with their work, which they should certainly be used to because they are an artist.