Square Enix has shared some details regarding the post-launch update fans can expect from Kingdom Hearts 3 via Twitter, details as follows;
January 29 (January 25 for Japan Version)
Version 1.01 update (several data fixes)
Memory Archive* (videos) – The Memory Archive option will be added to the game’s title menu and can be viewed at any time. The Memory Archive is a digest of the Kingdom Hearts story in the series up to this point.
January 30 (January 26 for Japan Version)
Epilogue* (video) – Video content that will enhance player’s enjoyment of the world of Kingdom Hearts. Players will need to have completed Kingdom Hearts III and seen the ending to view this video.
January 31
Secret* (video) – Video content that will enhance the player’s enjoyment of the world of Kingdom Hearts. Players will need to have completed Kingdom Hearts III and seen the ending, as well as fulfilled certain criteria during play to view this video. The criteria vary depending on the difficulty level selected.
Kingdom Hearts 3 releases for PlayStation 4 and Xbox One on January 25, 2019, in Japan and just shortly after for North America and Europe on January 29.