Looks really good! The only thing I noticed was that it looked like some of the wheels were are not touching the ground on the composite image. I am not enough of a compositing artist to give you help on that, but that is the only thing I noticed.
Open your eyes... Someone or something powerful created these creatures, these draconians... This is a war of conquest... This is the portent of the fallen stars... We face a foe who seeks, at the very least, to enslave us, or perhaps destroy us completely.