If I don't already own the expansion pack, I can buy it and have it for my ps3 and ps4 when I get one. If I buy the taken king collectors edition that includes the expansions, will the expansions work on the ps4 later? I know the taken king isn't part of the cross buy deal, but what about the expansion pass when bought with the taken king? I actually have the expansion on my system but it was purchased by another user account who had been playing my destiny game and wanted the expansion. Rather than buying it in my account, they bought it under theirs. So now I can't get the $40 version because I don't "own" the expansion.