You know, using Anakin's face and
clone trooper figs and calling them KotOR characters can be slightly confusing.
Nevertheless, the fig positioning is good and the vignette looks nice. The figs - however confusing - work, too. Zayne is recognizable and the troopers serve their lot.
One thing, though. You said the republic guards are from the KotOR MMORPG, i.e. these guys
? The game is placed over 300 years after the time of Zayne Carrick and the troops are rather new thing in the game, so you might have a little continuity problem here. (This is fanboy perfectionism now, but oh well..)
Therefore, even though the deadline is really soon and this might be pretty hard, I'd at least suggest replacing the clones with these guys, the republic troops of Zayne's era:
That would also make the vig far less Clone Wars-like.
The helmet should be easy to make with some sacrificable yellow space helmets and red and black sharpie. The torsos present a challenge, but something with red and black should be sufficient.
EDIT: One more suggestion. Since you took the original photos with green bluescreen and green light is reflected all over the vignette, I'd recommend switching the image background to some green-shaded landscape if you just can find one. You could also recolour all the visible lights in the picture green, so that they are the source of the green lighting, or figure out some other aspect to the image that would explain the green colour. I think that would really improve the overall look of the image.