Assuming CP is the Candlelight Processional Dining Packages, you are correct that they haven't been released yet. There have been a number of threads on the subject, but this one seems to be the most extensive:
http://www.disboards.com/threads/2015-candlelight-processional-adr-watch-thread.3418574/page-5
On the off chance CP refers to Crystal Palace, I haven't checked, but no one has reported any unusual problems getting reservations. If you were doing practice bookings for your dates they would not be available until the morning.