Monolith Soft's Xenoblade Chronicles 2 isn't quite finished yet, as on September 14 we'll get a new standalone game, Torna - The Golden Country, a prequel that lets players experience what happened when Torna fell 500 years before the war of the main story, this also being a DLC for owners of the original game, released last year as a Nintendo Switch exclusive.
The only way to get the DLC is to buy the Expansion Pass, already available on the Nintendo eShop, granting access to Torna - The Golden Country, the new Battle Challenge mode, plus some goodies like the Rare Blade Pack (with Xenoblade Chronicles main character Shulk turned into a Blade), New Quests Packs, and Helpful Items Packs.
Nintendo has just released a new trailer dubbed into English, so if this all sounds appealing then feel free to take a look. Is the Expansion Pass looking good?