Quote Originally Posted by Kairobot View Post
There will likely be a patcher available shortly before or during the (very) long maintenance period for the expansion. You will likely need the early access code activated on your account in Mog Station to access the new areas.
If this functions as most other MMOs the exact same patcher will be used to download the new content. The CD/DVD will just skip downloading from the internet part (which given how many people buy digital these days and the wonkiness of patch servers could be a significant amount of time).