On the fourth day of the splash page, Blizzard gave to us the fourth in the line of:
Splash image - It sees you!
Rune - Unidentified solar system
Purple monster puzzle piece - 16.jpg -> P - Right leg
Name in the master.CSS file - cold

The first thing you notice about the new image, is probably that the ice has cracked open far more. But you might want to take note of the
eyes in the middle of the opening. Who they belong to, remains to see.

The fourth rune is unidentified yet, but it looks like a solar system. It is speculated that it represents
WarCraft III, because of
this opening cinematic. Aswell as the
Arcane Sanctum from
WarCraft III
The "
Purple Monster", as it has become known as, get's a leg. Some speculated that it was a
purple walros, linked to
Michael Dashow (Developer from
Diablo II), but as you might know, walroses doesn't have feet. The speculation dashed to the ground. Some again say it's a
penguin, which might still be possible.
DASHOW was also speculated to be the codeword from each of the numbers from the .jpg files. With todays entrance of
16.jpg ->
P, that speculation has proven wrong.
Cold was the keyword from the master.CSS, which breaks the line of names from
Act V from
Diablo II. We would like to hear speculations about this.
The letters we have now spells
D O W P. We will probably need the next 2 letters, until anything is certain. What is certain though is that this creature has recieved it's leg, and is probably quite happy.

Will it spell out
P O W N E D in the end? :)
Sources:BlizzardBlizzard master.CSSDiablofans