Heavensward is the first expansion for Final Fantasy 14: A Realm Reborn, and it’s set for a spring 2015 release according to Square Enix.
According to information on the expansion posted by Gematsu, the expansion takes place in Ishgard, and the key plot revolve around the ongoing thousand-year war between the city and Dravinia.
Ishgard is ruled by an archbishop and “four noble horses” and contains varying geographical elements such as fields, highlands, mountains and floating land masses “above and beyond a sea of clouds.”
The city is contains a physical divide separating commoners and the privileged.
Another city state, according to some slides on the expansion, called The Holy See of Ishgard, will also be included along with new recipes, gear, jobs, areas, dungeons, high-end raids, airships, and new primals.
There will also be a new playable character race which is hinted to be the Viangaa.
Another plot in the expansion revolves are the The Wyrmking and his issues with Thordan and his Knights Twelve.
Presentation slides have been posted over on imgur. They look to have been pulled from the Twitch stream. Some are posted below.