Nice work, NinjaLA!
I was going through a bunch of game demos I had downloaded a few months back and hadn't installed yet and came across one called
Vivisector, which may be of interest to you with regards to your Kilrathi concept sketches. The game is an action FPS inspired by H.G. Wells' sci-fi novel,
The Island of Dr Moreau and appears to include some humanoid cat-like enemies amongst various others such as Hyena's, wolves, etc.
The developers have some relevant
source artwork and a series of
screenshots which may provide some inspiration.
These two images in particular are halfway to pulling off a Kilrathi, or at least the closest I have seen in a game outside of Wing Commander!
You can grab the Vivisector demo
here (2 level - 189MB). I've uploaded a
short clip from the demo (1024x768 XviD, 25 seconds - 5.59MB) which highlights some of the character animation -- in this case the hyena variants. The stutter in the demo is from my system struggling to record the sample using FRAP's, the animation is a lot smoother when just playing the demo.
Your Kilrathi and Confed Marine sketches look very promising, with a bunch of cool elements, such as the Kilrathi shoulder plates from the games and the muscular chest plating as seen in the movie. The only thing that seems a wee bit off to me is that the Kilrathi sketch appears ever so slightly top heavy, with the lower half a smidgen out of proportion, but it could just be the armour skewing my perception of the upper half.
In WC3, Kilrathi hind paws/feet are depicted as splayed fairly wide as seen below. I can't recall how they were depicted in the movie though.
Cheers,
BrynS