San Diego Comic Con 2012 is a gaming event that will be running from July 12 to July 15, 2012. Square Enix have revealed their lineup of games that will be appearing at the event via My Nintendo News, and this lineup confirms that Kingdom Hearts 3D [Dream Drop Distance] will be previewed at the event. The following paragraph was released with the lineup:

Kingdom Hearts 3D [Dream Drop Distance] – Celebrating the franchise’s 10th anniversary, Kingdom Hearts 3D [Dream Drop Distance] features a spectacular story that promises to be a fun backdrop to the colorful cast of Disney characters making their 3D debut on a handheld title. In addition to brand new worlds, Kingdom Hearts 3D [Dream Drop Distance] will also feature never before seen gameplay elements and will be available on July 31.

For those attending, GameRevolution have revealed where and when the game will be playable. You can see this below.