The Nintendo Switch Online Expansion Pack is receiving DLC from older games, which means that the fighters and costumes from Super Smash Bros. Ultimate could also be added in the future. Nintendo Switch Online's Expansion Pack is a premium tier that adds N64 and Sega Genesis games, as well as granting access to DLC for first-party Nintendo games. If the player stops paying for the Expansion Pack, then they lose access to the DLC content and the retro games.
When the Expansion Pack was announced, the only free DLC available was for Animal Crossing: New Horizons, which was still a big deal, considering it's the second best-selling game on the Nintendo Switch. Things got really interesting when the best-selling Nintendo Switch game had its DLC added to the Expansion Pack, as the new tracks for Mario Kart 8 Deluxe are part of the service. The Mario Kart 8 Deluxe Booster Pack is adding 48 tracks to the game, across waves of content that are still being released as of the time of writing.
Related: Every Stage Missing From Smash Bros. Ultimate From Previous Games
The DLC available as part of the Expansion Pack has all been brand new content. That has now officially changed, as the Nintendo of America Twitter account has announced that the Octo Expansion for Splatoon 2 is now part of the Expansion Pack. This could open the floodgates for DLC from older Nintendo Switch games, such as Expansion Pass for The Legend of Zelda: Breath of the Wild or Torna: The Golden Country for Xenoblade Chronicles 2. There's another Nintendo Switch with a lot of DLC that could also see its content coming to the Expansion Pack.
All of the DLC for Super Smash Bros. Ultimate is now available to purchase, with Sora being the last Smash DLC fighter. The
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