Danganronpa Decadence will release as a four game collection on the Nintendo Switch in 2021. This collection will include the previous Danganronpa titles, as well as some mini-games from Danganronpa V3 Killing Harmony. The collection was announced during the E3 2021 Nintendo Direct. It will also include an expanded version of the Danganronpa V3 board game as Danganronpa S: Ultimate Summer Camp.
More information regarding Danganronpa Decadence will release sometime in the future. This includes a potential window of release sometime in 2021. You can watch the announcement trailer below.
Danganronpa Decadence will release on the Nintendo Switch sometime in 2021. The games will also be available alone digitally.