Needs a bit of a clean up in places,feathering needs to be sorted out,text isn't quite finished yet...consider it a sneaky peek.
...now,back to my exams....
I am inordinately impressed with this work of art.
Brilliant, brilliant job - not perfect, but still very good indeed.
You're in the lead for now, although that's technically because no one else has posted a signature...
Also, it might be interesting if you added a "WMD detected" or "dangerous materials detected" or something rather threatening underneath the "stand by... scanning cargo hold" words in the signature.
Also, "scanning" should be placed after "target acquired," in my opinion.
I agree that the character render does look a bit strange.
I mostly chose the above render in order to bring in some variation, but I might as well try out the other renders and how they fit with the colour scheme and composition.