It will cost you $283.75 to upgrade a DL Premium Annual Passport up to a Disney Premier Pass. That will give you all the advantages of a WDW Premium Annual Passpost also, to include the water parks and everything. And it will also give you access to all the shopping and other discounts of a WDW PAP. Also you can buy the Tables in Wonderland Card, which gives a 20% discount on all table services restaurants and lounges, including alcoholic beverages, as well as certain quick service locations.