Don't expect too much. I haven't used maya for about 5 months,

I go for

Concept #4
Evil Robots
https://64.246.38.49/artbyfeng/vehicles/vehi_04.jpg

rules again:

1) Final textures must be no larger than 512x512
2) Characters are limited to 1 512x512 texture for the body, and 1 256x256 for the head
3) no limit for environments, but the average is around 10 512s or so
4) textures: 512x512, 256x256, 128x128, 64x64, 32x32, 16x16
5) use 1 unit = 1 foot
6) Environments would be approximately 50,000 triangles.
7) Characters approximately 1500.