I'm actually not expecting either aliens or zombies. I think what we're going to see will be more similar to IV's, but with the same protags instead of new ones. I'm all for that, but what I really want to see is places like the casino, a full office building downtown, open-for-missions-but-closed-in-free-roam sets, etc. being open and interactive. Seems like such a waste of space to not be used.