OK, I've started work on my Metal Gear themed side-art, and it's coming along pretty good so far. There's still some stuff i need to figure out, but as for the basic idea I've got it pretty much figured out. I'm going for a sort of "movie poster" style image of Solid Snake, with the original Metal Gear on a rocky hill in the background. Currently I have it in a daytime setting, however I may change it if I decide that's what's best.
I've also considered adding some foiliage rather than just leaving it as a barren gravel terrain. As you've probably noticed, Snake doesn't have full legs, but that's because I'm not planning on having the art go down the entire length of the cabinet, but rather cut it off with some kind of border (if you've seen the original Metal Gear box art, that's a similar example of what I'm planning). There's still a lot of work to do, but I'm getting there!
Feel free to give me any comments and suggestions you might have!