Wonderful color scheme; sun or bright lights coming through fog? Mysterious, original, nice touch. Overall color choice is good, very baroque, it is a little dark in shaded areas, more light reflection/dynamics could be utilized at different counter points. Warrior and dragon have same blue, is there a story there? Are they linked?
Centurion alone would be a good title. Is character atop a mecha shoulder? Would be nice to offer multiple perspectives. Wings make dragon look stempunk, would you add any more steampunk style to this?
Would that weapon be beneficial to a warrior atop a flying beast? Seeing the tech, how about a some kind of gun/rife for long range?