It's looking awesome!
Thankfully Portrait of Ruin uses 256 colours for all portraits, which means we won't be as limited as with Dawn of Sorrow.
Take a look at this for example:
(Shitty scaling, I know)
I did that quick mockup with the image you posted (without modifying a thing).
This might you give an idea of how it looks in game.
It is by no means the final Redone portrait for Death, of course not, I don't have the proper scaling tools to do so at hand right now, but at least it helps to carry over the idea