The image associated with the name is "the distance you fall in your dreams" (presumably as in how deeply you fall into your dreams).
This is great! Now I feel bad for saying the title sucked, it makes more sense now, and sounds pretty good, but it reminds me of Inception.
I'm really looking forward to this game. It sounds ands looks great. I'm hoping there will also be a new original world, like Hollow Bastion or TWTNW, which would be there to foreshadow Kingdom Hearts 3. I wish they would release more aboout what new worlds will be in the game.
My prediction: KH:DDD won't come out for another 2 years. Kh2 came out 3 years after it kh1, and bbs basically came out 5 years after it debuted (as the secret ending). It's entirely possible that he's releasing info too early again, and we have a MASSIVE wait infront of us again. Which pisses me off.
However, the game looks awesome, and while I'm skeptical about the switching characters idea, I'm willing to give it a go. Nomura hasn't led us astray yet. (at least... Not very astray. I'm looking at you kh2/days)