CB: Comic-Con International has posted preregistration guidelines for 2014 on their website. Preregistration will begin sometime in early 2014 and registration will open to the general public at a later date.
Breaking from previous years, Comic-Con will only be selling singe day passes for 2014. If you buy single day passes for all four days you may exchange the four seperate physical passes, on site, for a single four-day pass. Preview night passes will only be available to those who register for at least one day of the convention proper.