Hehe it is true that the Phalanx is currently SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS SPOILERS beset by a daemonic incursion led by Bel'akor and an Iron Warriors warsmith. On the other hand, the defending forces look like typical Black Library 'under-dog heroes' so I don't fancy Chaos' chances in this, especially considering the Fists are on home turf in one of the greatest fortresses in existence. Although that is not strictly a fluff-based argument, more just looking at the way Black Library writes
I was under the impression it took a good 10,000 or so years for Abaddon to work out a way of bypassing Cadia for the 12th Black Crusade?