You can never kill the Devil. He'll always be back. Breaking the law or playing with madness. :(
Anyway, evil penguin, anyone?
And the new rune... Does form a pentacle with the other runes. Maybe... Pentragram = Diablo, space = Starcraft, Arthas' eyes = Arthas' eyes?
DAMN, TOO MUCH SPECULATION.
It's like every day this week is Christmas. Devil Christmas.