I really hope we get to dive deeper into what this is suppose to be

YES. ABSOLUTELY.I just, really, really, REALLY want to see the realm of darkness etc.

That is a world that was sent to the Realm of Darkness after its heart was attacked by the Heartless in KHI.

We will.

 

KH3 will answer all of the questions we had about the series!

 

It's Cinderella's World, Castle of Dreams, after it was consumed by heartless and fell into the darkness that is RoD.  Which fits nicely in the storyline since 9 years later in KH1 we meet Fairy God Mother who says it disappeared in darkness, and with TAV all otherwise engaged in their doom, no one was there to save it until Sora came along at 14.  

I wanna know why we havent seen the whole orqanization 13 return 

I wanna know why we havent seen the whole orqanization 13 return 

 Well some might be the hooded figures who haven't been revealed yet and some just might not be important to the story- we shall see. You also have to remember that you revive where you lost your heart so it could be that we just haven't seen the last 4 yet bc we weren't where they revived . They weren't apprentices or from RG( that we know of) and joined later than the rest .