Kingdom Hearts 1.5 HD Remix packages together Kingdom Hearts Final Mix and Kingdom Hearts Re: Chain of Memories, and includes HD visuals and new skills.
Another addition fans can expect is tweaked controls: you'll be able to control the camera with the right analog stick and reset it with R3; talking to characters can be done with Triangle, and Summons have been moved to the command menu (so Mushu won't be an issue now). Also, event scenes can be skipped.
KH HD launches in Japan March 14. No other dates are currently known.