The DLC - Shadow of the Erdtree is officially in development and will be coming soon to Xbox One, Xbox Series S|X, PS4, PS5 and PC. Although the exact release date was not given.
This is very exciting as the game is celebrating its 1 year anniversary of immense success. It recently crossed the mark of 20 million copies sold!
We do not know anything about the DLC but it will definitely keep us up at night theorising!