Update 1: Both the long version AND the short version now have English subtitles.
Earlier, Kingdom Hearts 3D: Dream Drop Distance appeared at Jump Festa 2012 with a new 8-minute trailer. Square Enix's YouTube channel has been updated with the trailer, and this trailer can now be seen below in HD 720p with English subtitles. The English were translated by sqexgal, edited by goldpanner, originally supplied by FF-Reunion, and put on top of the video by KH13.com. Please give credit if you use this video, and enjoy! Feel free to discuss on our forum.
Long version with English subtitles
Short version with English subtitles