The Forsaken: Annual Pass is for 3 additional DLCs on top of Forsaken. It requires Forsaken; it doesn't include it. You need to buy the Destiny 2 Forsaken Complete Collection. Destiny 2, Curse of Osiris, and Warmind will be free with New Light, and as such, they're included for free in the Shadowkeep purchase to make it simple for people who just want to purchase one thing instead of two or three later on. Already owning those from a separate purchase will not cause any issues with your account; any already-owned products will simply overlap. You will not receive an extra copy of them. The same is true for the newly priced Complete Collection. You're pretty much just paying for Forsaken and the Forsaken: Annual Pass. It's 40 USD (or your equivalent) which is the same price that Forsaken used to be until the price drop. You can play Shadowkeep without Forsaken, and you can play Forsaken without Shadowkeep. You cannot, however, play the Forsaken: Annual Pass without Forsaken. So, if you want to have access to everything you possibly can, you need to buy the current version of the Forsaken package (which is the Destiny 2 Forsaken Complete Collection) and the Shadowkeep package. Neither includes the other; they're entirely separate; however, both of those purchases include the New Light content, as that's going to be released for free, and it makes it easier for people to access.