Who's up for a grand campaign? Or just one of the games if you'd like but grand campaign as single player is kinda lame. You just conquer the world when you have 1000 years to work with
Sons of Abraham is out next week, so I say can start up a multiplayer after that. One night a week or during the day on weekends can have a time set up. CKII has a converter to EUIV that's offical and there will be one out for EUIV to VII (and EvW will be out sometime too, which will probably have something like the Swedish and Romans in a nuclear war)