At this point it goes without saying Nintendo just wants to forget the Nintendo Wii U ever existed. Almost every noteworthy title was ported to the Switch, or got a better version like Super Mario Maker 2, leaving a handful of titles on the table. Of those titles, only Tokyo Mirage Sessions #FE was the only one missing on the title, which will no longer be true on Jan. 17, 2020.
This version, like a lot of the previous titles, will feature new content. The Direct mentioned a new song, which is more than enough considering it really is a game a lot more players should get to experience.