User blog comment:DirgeOfCerberus111/An Alternate Universe? Let the heresy begin!/@comment-3562230-20110910004658

Since the Eye of Terror is not created the Chaos marines would have no where to go other than the warp itself. Their attacks would not be as bad I think.

The fight between humanity and the Eldar would be epic; perhaps Horus and some Eldar would join Chaos and fight the good Eldar and the Imperium.