Not long after the release of Fire Emblem Fates in Japan, details for the third scenario for the game were released.
The third scenario will cost 2,000 yen regardless of version you own, and will have the same amount of story content as Fire Emblem: Awakening. A release window for the post-launch, third scenario was also confirmed for some time in mid-July.
Not much was given of what the story will be, only that you will face another group outside of the Hoshido and Nohr kingdoms.
Fire Emblem Fates is still slated for a 2016 release window in the West.