Now I don't know much about the lore, but as far as I know Sauron and his master Melkor/Morgoth could change their form, appearance and even their size at will! No offense, but i highly doubt that he would chose to look like this of all things, If he were to have regained his physical form that is! But non the less this is a very interesting piece to say the least! You must have quite a twisted dark little imagination to have been able to come up with this!
Alrright then, let me instruct you in some deep lore shit!
Sauron, as well as his master Melkor, both lose their power to change shapes eventually in the story, and both of them got stuck in their "Dark Lords" forms. Now, there is actually not a single clear description on how a Dark Lord looks, only a couple of details and some interpretations. We are told that both of them normally assumed Fair forms to go around and talk to people, and said forms were similar to elves but far more beautiful, and with an aura of brilliance and perfection around them. It is also said, that the Dark Lord form is the complete opposit to the Fair form, being a shape of their complete twisted malevolence and hatred for the elven kind, and everything that was important to them. Also, we are told that the Orcs are product of that hatred, elves that were twisted by darkness and malevolence into their current form. So, from a design point of view, it would be normal to assume that there would be a relation in the shape of an orc and the look of their God creator. Remember also that Melkor hated the elves becasue they weren created by him, and he wanted to create "elves" of his own, so he is considered the father and God creator of the orcs. And as it is in any religious genesis of individuals, the offspring are creted in his image and likeness. Sure, Melkor was able to change shapes, but the orcs are created by his hatred and most dark feelings, so, Dark Lord. In the other hand, also Dragons and Balrogs are product of that same darkness, and they all share that smoke and fire theme, so it would be fair to assume that everything that had to do with Melkor dark side was, well... dark, fiery and monstrous, and the complete opposit of Fair, bright and perfect.
Getting back to Sauron, we could say that he was a lower level Melkor, so his looks were probably similar, only a little bit less grandiose. In the books he is only described in one line, were it says that his body was completely blackened by the heat from his body, and that he could melt people just by touching them. So having all those things in mind, I picture him as some sort of a humanized and more regal balrog, with some facial features that reminds a little bit of the orcs, but in a more perfected way. The fact that his skin is all ripped and scarred is a complete free interpretation from me, and I did it only to give the idea that he begins looking more and more devastated every time his body is resurrected, as if his phisical shape could no longer retain his essence.
Right! While I agree with you on almost 90% of the points that you provide, I still have an opinion that somewhat differs from yours! While I'll agree that Sauron along with his master Morgoth are truly twisted and represent the depth of the very Oblivion that ones conscious can descend to, they also represent another aspect of evil: lust, jealousy, greed, superficial beauty! Like the shining light in the middle of the almost pitch black Mordor! Even the ring itself shows how beautiful and alluring yet absolutely destructive and devastating at the same time Souron can be! I in-vision him as more of a tragically beautiful fake light in his own personal hell that he himself created! In Sauron's case I think his aura and even the armor he wears shows his true face more than the face that he might have hiding behind that very helmet! What I am trying to say is that his looks should be represented by the way he apparently loves to twist and control other people! And also it is usually the underlings that draw the short straw, so I really don't believe that Sauron would share the fate of the hideous dis-figuration of his underlings! Sauron will be the one still holding on to that very fake grace of his, while his underlings and even his own armor will represent his true face! I don't know If this makes sense to anyone but me, but then again this is my opinion and I guess everybody has the right to have one! Even the ones that aren't as well informed like me
I would say that you captured very well the vision of Tolkien for Sauron. Black skin and eyes of flame. By the way, is it only me, or I might be able to see Benedict Cumberbatch's facial features? After all, he's now the canonical actor for Sauron, isn't?