Bethesda has announced on their website that,

“announce plans to release the complete Skyrim collection with The Elder Scrolls V: Skyrim® Legendary Edition.
Coming to Xbox 360, PlayStation 3, and PC on June 4th (European territories will see its release on June 7th), this package includes the most up-to-date version of the original game (employing the 1.9 title update),as well as the game’s three add-ons: Dawnguard, Hearthfire, and Dragoborn.”