Anet, "Inviting all pre-purchasers to join us for a special revenant test weekend starting Friday, July 10, at noon Pacific Time (UTC-7) and running until noon Pacific Time (UTC-7) on Monday, July 13. During this test weekend, you can create and play a revenant beta character anywhere in the existing game: PvE, PvP, and WvW! We’ll also be opening up our new Player vs. Player game mode, Stronghold, to all players who play in the queue for Unranked PvP over the course of the weekend."
More Information:
https://www.guildwars2.com/en/news/announcing-the-guild-wars-2-revenant-and-stronghold-test-weekend