Confused by the long titles and many, many entries in the Kingdom Hearts series? Worry not, the whole series is now in HD, with the introduction of Kingdom Hearts HD 2.8 Final Chapter Prologue, which contains Kingdom Hearts 3D: Dream Drop Distance, the cinematics from Kingdom Hearts Unchained Chi, and a brand new chapter, set after Birth By Sleep. 

You can watch the trailer below:

All we know for now, is that it will release sometime in 2016.