I think the overall concept is cool, but you need to sit down and figure out how that wing interconnects with the body, and how it will all mesh as a model.
Or just do a rough model. Anyways, it's cool, it's just hard to read right now.
pics or it didn't happen :P nice colors on the concept though! some bright highlights might help establish some focus and make your concepts pop a bit more.
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First sketch attempt (not first really)
[link]http://www.painbringer.com/gallery/my_dominance_war_iv/dw4_goat-centurion_concept-A_10.jpg[/link]
working on wings:
Or just do a rough model. Anyways, it's cool, it's just hard to read right now.
Some crazy extra detailed sculpting work here: