While your design is original, it just doesn't work for me. Aside from the OMFGGODZILLARAWR! your design isn't what I hope for the film. I'm not saying it's bad, it just doesn't scream Godzilla. Better than Zilla though.
I like 90% of Godzilla's design here. I would change: 1. The skin texture. Make it more like classic Godzilla skin. 2. The spikes on his back. Make them look more like coral formations, like on classic Godzilla. 3. The shape of the head. Make it more mammalian, like classic Godzilla.
I hope they take a less natural approach in the new Godzilla. The fact that they are using Japanese on the cover art makes me hopeful that they will stick a little closer to the Japanese versions. I really don't want to see another iguana Godzilla from Jurassic Park. I want to see something a little more beefy and epic.