Iterative turn arounds of things to be understood readily by the 3D artists is a great thing to strive for! These are wonderful designs! I'd admonish to not readily cite your source of inspiration however as it is somewhat like leading a jury as a lawyer. The better thing is to let the work breathe like it is wine in a decanter. Extrapolate from many, many sources and no one will know what you are making up like Frankenstein anyhow! The colors are very fun! Next level would be to either use shape or color to indicate the intention of mood and purpose within the framework of your story. All things have story, so just enjoy making one up and reverse-engineering which designs help best to illustrate it! I sense a willingness to integrate many colors in armor here and it may be that the world itself is similar and denotes camouflage or that it is culturally open to remixing itself from wherever this character arises! I enjoy that this feels more akin to Planet of the Apes than Avatar itself. The photo-work meshes well in your painterly style! If rapidity and concept is your focus, give me the rounding forms and blue-printing. If style itself is the selling point, develop yourself to be "on model" in many directions; like a swiss army knife. If both is your aim, be unafraid to show a spread of illustration, breakdown, and even verbalization where needed, though on page would be best given that directors cycle through so much work at such high speeds. The concept art community is odd. It translates through to marketing illustration but it is first and fore-most about prototyping and drafting. Technological speed is increasing, so perhaps also integrate your thematic core. If you can produce anything at the snap of finger, what topic and feel would you choose? Individuality, in this manner, will be a boon as tech increases. However, keep in mind that concept art is about testing before spending time and resource into production. Help a producer answer the questions of "why" build out this thing and it will go over swimmingly! You're doing great! Keep going!