Welcome back, Elizabeth! Sailing with Disney Cruise Line ensures you have plenty of options for wine on the ship.
There are two different Wine Packages available, which you can view on the
Gifts and Amenities page of Disney Cruise Line's website (scroll down under Spa, Beverage and Merchandise Pre-Purchase options). With either package, you will get to choose the wine each night from a few that the sommelier suggests with your meal (these are listed on the website as well). The entire bottle is yours, even if you don't finish it at dinner. You can bring it with you back to your stateroom. It's actually very nice to have that bottle in your room, as the next day you can enjoy a glass while you snack on some cheese from room service. Since room service is complimentary, (though a few dollars tip is appreciated), we love to order snacks to the room and have a glass of wine as we get dressed before dinner each night.
I should also mention that you are able to carry on your own wine when you embark if you'd prefer. Many guests do this to have available throughout the cruise. There is a corkage fee of about $20 per bottle, if you'd like to take the bottle to one of the main dining restaurants though, so that certainly adds up. However, if you open it yourself, you're welcome to enjoy it elsewhere on the ship.
I hope this helps, Elizabeth! Let me know if you have any other questions as you continue to plan your cruise!