User blog comment:Drkdragonz66/Black Ops II - 8 Players and Zombie Story Mode hinted/@comment-1376910-20120504013408

"You will understand everything."

I bet they're gonna somehow tie in everything that has happened since the beginning, in Nacht Der Untoten. If not reworking the levels for a linear story, I can see them finding a way to include bits and pieces from every map released thus far.