Ok, so I've been a bit distracted by work and a squad of daemonettes that tried to seduce me into painting them first, but I've made a bit of progress.
Also fluffwise... I'm considering being very pretentious... more on that after the pics.
And an older but more detailed shot:
Ok, my fluff:
Who knows what happened 10 millenia ago, when the Emperor and the broken body of Sanguinius were returned from the corrupted, warp twisted hulk that was once the pride of the warmaster's fleet? As the Emperor was rushed towards the Imperial Palace, before the golden throne was invented, when his attention was still torn between the grief at Horus' ultimate betrayal, and maintiaining his psychic defence of the warp-gate spawned in his laboratory by Magnus' warning, what happened to Sanguinius' body?
Already once twisted by its brush with the warp, the body of Sanguinius was intrinsically woven with the demi-elemental fabric of the warp. And though Sanguinius' life had ebbed away as he lay torn at Horus' feet, the Emperor's genetic programing put him into the stasis that allowed a spark of life, if nothing more, to remain within the shell of his body. And so, as he lay embalmed and ready for burial at the head of a legion of fallen heroes, his carapice irreparably destroyed, subtle tendrils of the warp hid his life from the Terrans, and so he was laid to rest.
As the Emperor slowly weakened, an unknown entity of the warp was able to infiltrate his vigil of the warp gate in his palace, and steal away Sanguinius from his mauseleum. Now, after a thousand years hidden within the twists of time and pseudo-space of the warp, he has awakened. And he sees instead of a glorius crusading humanity that he left, a twisted, bloated beast in its death throes. Dismayed, he casts through the visions shown to him through the warp, sees the vast tide of aliens pushing back mankind's hold on his planets, sees the vast departmento munitorium sacrifice needless billions of souls to the xenoform, the arch-traitors' forces, and to the soulless void of an existance that faces almost every citizen of the Emperium. And he knows that he can lead mankind from this brink of annihilation, given the right tools.
But one thing, one vital thing must be accomplished first.
DEATH TO THE CORRUPTION!
DEATH TO THE WANING OF MANKIND!
RELEASE THE SOUL OF THE EMPEROR!
I AM IRAQIEL, AND I WILL BRING TO YOU SORROW!!!