Essentially a heavily modified leader class Energon Megatron, with parts taken from a variety of sources.
That's an interesting permutation of Energon Megatron. I especially like how you altered the orientation of the alternate form. The claws in robot form are also a nice touch. The proportions bother me, but that's a problem with the mold, not anything you did. You did a great job here. By the way, is Lord Vulcan the main antagonist of your story, and how does he differ from your average Megatron/Galvatron?
He is the decepticon emperor in my Darkfuture fan fic {and soon to be seen in animated form once I finish animating the first episode of the CGI adaptation of my fic.} He differs from your standard Megatron/galvatron in the fact that his very presence leeches light out of his surroundings, and he grows stronger in complete darkness .