This morning Nintendo debuted the newest content coming to Animal Crossing New Horizons. Titled Happy Home Paradise, it will allow players to create vacation homes and includes new inventory items, features, Amiibo additions, and more. You can find all of the details via the official game page.
The previously announced N64 and Sega Genesis additions, and the upcoming Happy Home Paradise expansion, will all be locked behind a new expansion for Nintendo Online. Nintendo Online is currently priced at $19.99 annually for an individual membership and $34.99 for a family membership.
Nintendo Online with the Expansion Pack of content will run $49.99 annually individually or $79.99 for a family. You can find additional details from Nintendo via their main page here.