Even before the launch of Final Fantasy XIV Stormblood, you can play the new addon for the Square Enix MMO. How you can access Early Access and get early access is explained here.
On June 20, 2017, Stormblood, the new expansion for Final Fantasy XIV, will be released. In it, you gain access to new regions in the east as well as new classes like the Red Mage or Samurai. If you don’t want to wait that long, you can already enter the addon earlier via Early Access.
Final Fantasy XIV Stormblood – Early Access for Pre-Orders – When does it start?
Starting Friday, June 16, 2017 at 11:00 AM (CEST), the Early Access to Stormblood begins for all eligible players.
Eligible to participate are all players who receive an Early Access code and have registered it on their account. You will receive such a code via email if you pre-ordered the game from the Square Enix store. Playstation players do not receive a code; their Early Access will automatically be activated on their registered account.
Before the start of the early access, there will be maintenance. Characters that meet the requirements for Stormblood can immediately dive into the addon afterward. In order to play the content of Stormblood, the main story of Heavensward must be completed up to the quest “A Cause for Boldness” implemented with patch 3.56.
Final Fantasy XIV Stormblood – Early Access for Pre-orders
PC players, by the way, must officially register with their activation code after the end of the Early Access to Stormblood on June 23 to continue playing. Playstation players are exempt from this and can simply continue playing. A detailed guide to the Early Access codes and necessary procedures can be found in the source reference.
Also interesting: Final Fantasy XIV Stormblood – The launch trailer is here

