Square Enix says the name for this game is Kingdom Hearts HD 1.5 ReMIX, but I'm not going to call it that. Let's stick with... Kingdom Hearts 1.5.
Here's the official PAX trailer for Kingdom Hearts 1.5, an HD remake of the first Kingdom Hearts that also includes Kingdom Hearts Re:Chain of Memories, cinematic scenes from Kingdom Hearts 358/2 Days, and extra content from Kingdom Hearts Final Mix. It'll be out this fall for PS3.
Yeesh. Writing these names is exhausting. Anyway, this trailer is fun, even if it is filled with wonderful gibberish like "When your sleeping memories awaken, you may no longer be who you are now." Kingdom Hearts!