During their Nintendo Direct presentation today, Nintendo announced a new expansion for Xenoblade Chronicles 2. The new standalone DLC is called Torna ~ The Golden Country.
The new expansion showed several scenes and some gameplay in a trailer. Little else is known about the upcoming DLC aside from that, but you don't seem to play as Rex. Instead, you play as a new character altogether. As it turns out, this is going to give players a look into the past.
Xenoblade Chronicles 2: Torna ~ The Golden Country takes place 500 years before the events of the main game. You will play as a hero fighting against Malos. The battle system from the main game has been refined, and you can fight as both Blades as well as Drivers. The game promises "a journey through the tragic history that doomed a kingdom and drove a hero down a dark path".
Torna ~ The Golden Country will be available as part of the Expansion Pass for the main game. In addition, Nintendo announced that the expansion will get its own retail release as well. Currently, they don't say which retailers. However, the listing does say that you can expect to see which retailers will stock the game "soon".
This is a standalone expansion to Xenoblade Chronicles 2, which released in December of 2017. The Nintendo Switch exclusive was very successful, selling 1.31 million copies as of April 2018. This cements it as developer Monolith Soft's best-selling game in their history.
Xenoblade Chronicles 2: Torna ~ The Golden Country releases on Nintendo Switch on September 14, 2018, for Expansion Pass members. It arrives at retail on September 21, 2018, as a standalone expansion with no price announced as of now. The Expansion Pass requires the base game,and costs $29.99.
If you want to know more about this and other announcements happening at E3 then be sure to check out our E3 2018 Coverage Hub.