Interesting concept, great realization. My favorite is the second one, the light of the third version is just to bright compared to the remaining dark color scheme.
This version's a lot better, but the two chopper-things are really distracting. The composition would be a lot better if they were gone. Also it would nice if you get the warmachine a little more illuminated and with more lights, like in the first pic. Sweeet work as always man.
the chooper things are gonna be more defined. they are the scouts that collect the humans so they have to be there. I just added a new one with better lighting be sure to check that out.