User blog comment:Saratje/PC release date explained - Skyrim: Dragonborn DLC/@comment-3492791-20121128054340

This is nothing but gibber jab. Regardless of any speculation you can make, the fact of the matter is that, from our understanding of the contract, it was stated that the first two content packs released by Bethesda for The Elder Scrolls V: Skyrim would be 30 day timed exclusives for the Xbox 360.

Dawnguard had 30 day exclusivity.

Hearthfire had 30 day exclusivity.

Regardless of what you want to call them, Microsoft got two exclusives. So unless Beth is handing shit out for free, the contract has been fulfilled.