LordLucan wrote:The first is Kaela Mensha Khaine, the God of Wrath, murder, exile and war. His human followers call him simply 'Khorne', a corrupted version of his true title.
Khaine and Khorne are indeed very similar and Khorne might indeed have stolen some (or a very huge chunk) of Khaine's rule and power after the fall but to slap them into one being? But Khorne existed even before Khaine was dismantled in this universe.
I'm using the old reference from old GW material where Khorne was born in middle ages and Nurgle during the Black Death (as if the Galaxy is revolving around one tiny world called Earth... Hah!). Even if these events are just unhappy coincident (or more likely were shockwaves of birth of those Dark Gods) this would mean Khorne and Nurgle are old and their existence is separated from Eldar Gods.
One could argue that Khaine took over Khorne after it was banished by Eldar but for an exiled (and weakening) God to take over an existing (and powerful due to all the wanton bloodshed this coup caused) is rather odd (and needs plot devices to work if you ask me).
Also there's the faithful Eldar to consider. Why would they abandon their Warrior-God especially in this hour of need and allow it to merge with Chaos God Khorne?
According to Lexicanum there's this guy "Malice" who seems to be the embodiment paradox of chaos in being enemy of itself... maybe he joined Khaine and dethroned Khorne?