No.
However you could do a split stay. You can set up a room only reservation for 11/21-11/23 and then start your FD package 11/23 to 11/28. You can get the tickets from your FD package up to 3 days in advance. You will not have dining privileges until 11/23 however.
Note that you will need to check out and check back in on 11/23. You will link your reservations and if both are same resort and room type, you might be able to keep the same. Otherwise, you would need to pack and move before 11am and back after 3pm.
Of course, you would want to get tickets to cover you complete stay.
Once dates are announced and assuming they are as the current PIN offers, you would have to call up and make the corresponding changes, but due to availability you need to make sure you don't run into problems therefore, you want to:
* Make a room only reservation for 11/21 - 11/23
* Make changes to your existing package to apply FD by modifying arrival date
Some have in the past make the mistake of shortening the arrival date to then find out there were no room only options. And when they tried to change back to keep the existing reservation, there was no availability and had to either change resorts or worse, screwed.