Just been staring at the pic.
Theres something about it that screams vampire hunter/holy warrior.
Its different to the other Promovahkiin shots because of the shining light in the background (which is always used for holy/against evil characters)
The arrows give the vibe that he's a hunter of sorts, especially since its the only Promovahkiin with archery equipment.
The scratches on the helm look a lot like the ones on the early Skyrim screens, so i dont think they point towards anything.
The eyes are something story related that cant just be guessed, but maybe they're like a blessing of a diety or something, or Meridia? (hates undead)
One more thing; i wish they made it damn wallpaper size
