User blog comment:Vivaporius/Extra-Galactic Invasion Campaign Idea/@comment-3341288-20120706184440/@comment-3398633-20120706200445

Ah, but that's the beauty of it. The Ultrasmurfs/Necrons/Kaldor Draigo don't know about the new galaxy. They were all occupied elsewhere at the time, and given the travel issues the Imperium has, it took them forever to get to the gate if they did, and by the time, the other one was destroyed, prevent the Sues of 40k from making to their distanation.