https://wccftech.com/super-smash-bros-ultimate-dlc-leaked/

Super Smash Bros Ultimate is going to get some DLC characters during the course of the year. Two of them, Joker from Persona 5 and the Piranha Plant from the Mario series, have already been revealed, but there is very little we currently know about the other fighters. We have a better idea on who they may be, however, thanks to their codenames.

The codenames of the upcoming DLC characters for the Nintendo game have been revealed through data mining – Jack, Brave, and Packu.