So apparently I was beat to this idea, but the other one looks completely different from mine so I figured I'd still post mine. Reds became purples, blues became blacks. I did this in like three seconds because I was bored lol.
I like it....and about that Head stuff....He takes your SPARK and then mounts it on the wall....now that's evil
Or... or instead of taking your face/spark, he gives you stuff... because SG is like, opposite and not just evil, if that makes any sense. Yeah. Movie Prime is generally more sinister than other Primes, so SG Movie Prime should technically be like Vader in that there's good under all that evil tyrant warlord stuff. (I'm just making this up as I go. You can't tell, right?) ... ...But anyway, awesome!
I could see this being a repaint for either a Nemesis Prime, or a Motormaster, not as a bad thing that is. This guy would even make the Decepticons piss themselves(if they had the "equipment" to do so). Plus about all the spark and head mounting, why not both? Have their spark in a jar on the mantle, and the face hung over it for a reminder of how bad ass he is?