The trailer is the same shown at D23 Expo Japan 2015 in November, but was never released online.
Kingdom Hearts HD 2.8 Final Chapter Prologue is a compilation including a remaster of Kingdom Hearts: Dream Drop Distance, a Kingdom Hearts Chi: Back Cover movie, and the completely new Kingdom Hearts 0.2 Birth by Sleep: A Fragmentary Passage. It will launch for PlayStation 4 in 2016.
Kingdom Hearts III is in development for PlayStation 4 and Xbox One.
Watch both trailers below.