It seems the ReMind DLC is a Final Mix version for Kingdom Hearts 3. Final Fantasy characters will make their big comeback, new boss fights will be added, and the scenario seems to engage more frankly towards the next DLC.
In any case, it will concern Sora's identity and the memories that other characters in the tortured universe of Kingdom Hearts have of him. In this trailer, we also see the possibility of taking control of Kairi!
ReMind will be released on January 23, 2020 on PS4 for $29,99.