https://www.polygon.com/2018/11/1/18051896/super-smash-bros-ultimate-dlc-characters-price-release-date

During Thursday’s Nintendo Direct, highlighting the massive scope of Super Smash Bros. Ultimate, director Masahiro Sakurai announced inevitable plans for a paid DLC to be rolled out in the months after launch.

Despite 74 characters already on the roster (with the last-minute announcement of a post-release Piranha Plant fighter bumping the count up to 75), Sakurai announced that the game would add new fighters, developed from scratch, exclusively for the paid DLC fighter packs.