The US-arm of Amazon has apparently revealed that the exclusive Destiny content for PS4 and PS3 will remain tied to those platforms until 'at least Fall 2015'.
Spotted by CVG, the website says: "Exclusive content for PlayStation 4 owners includes the Exodus Blue Competitive Multiplayer Map, Dust Palace Strike, Weapons, Ships and Gear that will only be on PlayStation until at least Fall 2015."
The exclusive DLC is part of a major tie-up between Sony and Activision. The Destiny Alpha test was exclusive to PlayStation, and the Beta on July 17th is also Sony exclusive. That's on top of the fact that Destiny will ONLY launch on PS4 in Japan and a special PlayStation 4/Destiny hardware bundle, including a White PS4.
There's a bit about it in our PlayStation interview, which you can read in the latest edition of MCV.