Edit: ArenaNet has released a statement regarding the state of pre-purchases for Heart of Thorns.
During tonight's Guild Hall announcement showing at E3, ArenaNet has announced that you can finally pre-purchase Heart of Thorns. There are a few different editions available and many details to read through, so make sure you check out their FAQ page on the official site before heading over to the purchase page to ensure you choose the edition that's right for you.
Here's the basic edition structure of the Pre-Purchase system.
- Guild Wars 2: Heart of Thorns expansion (includes Guild Wars 2 core game)
- All Standard Edition Contents
- Additional Character Slot
- Miniature Revenant Rytlock
- Revenant Finisher
- Mordremoth's Bane Guild Hall Decoration
- Heart of Thorns Glider Skin
- All Deluxe Edition Contents
- $50 in Gems