In the Beast Arises series the Beast is found to be based on Ullanor.
Once the Ork threat has been neutralised the Mechanicum "destroy" the planet. However what they actually do is use the Orks own tech to transport it to a new system, strip it of all its interesting tech and then rename it Armageddon.
it then becomes the focus of numerous attacks by Chaos and Ork armies and gives rise to Yarrick.
Is this history of Armageddon new to the novel series, or have Games Workshop hinted at, or stated it in the past prior to the release of the books?