The 26th Century

"The Cybermen conquer all, the old models must be deleted. We are the ones who have evolved, emotions are weakness, weakness brings deletion. DELETE!"
The Cybus fleet keeps firing, managing to destroy a few of the prime universe vessels before they cloak.

"You mistake superior intelligence for emotion. Cybermen are built for survival, as are our biological components. We have removed the unneeded organs and protect the rest. We are the inevitable result of evolution. You are computers." The Cybermen re-cloaked, but not before seeing the end of a number of their vessels. The Cyberleader heard over his internal comm the command of the Cyber-Controller. He relayed it to his crew. "Use our transports too scatter the atoms of the wreckage. They will not benefit from our losses. We will improve our defenses after we reach our destination."

The last Prime-Cybership transported to the same coordinates as the Daleks, except they were destined to arrive years before them. They would not be detected on arrival. At least, not until it was too late. <<at least that's their plan >>