So if you haven't heard it yet Arenanet has announced the 1st expansion pack for Guild Wars 2
It will be called "Heart of Thorns".
The major features are:
* The Mastery System
* New Area "The Heart of Maguuma"
* Profession Specializations
* New Profession 3rd Heavy armor class "The Revenant"
* Guild Halls
* New PvP Game Mode "Stronghold"
* New WvW Borderland
These are all the major features that are announced now.
You can watch the entire stream here on youtube:
And the trailer here:
And for further updates and information you can visit the official site of hear of thorns: