By the way, I'm working on my own version of the great one. My concept goes more in the direction of a ghostly, almost undead Terminator thing. While you're approaching the concept from the angle of a cartoon (and you're VERY accomplished, if I may say so again), I'll be taking the big-budget, live-action motion picture angle.
If you ever plan on one day animating him, I have a neat little visual gag I came up with a while ago that I'll let you have off of me: Even though there's nothing under his robe besides a cybernetically-enhanced ribcage, you can still see leg movements under the robe. For the motion picture, I'd accomplish the effect with a pair of form-fitting, wrinkle-proof blue (or green) stockings, the idea being that Prime would be filmed against a chromakey set.