I really doubt it will be more than what it was in KHII. It just seems that all three go there really early on and Yen Sid offers them advice and then they leave. Nothing else to it.
Notice how every other world to appear in Famitsu has gotten a two page spread and this one only got one? I think its obvious it won't be as large as any of the other worlds.
Notice how every other world to appear in Famitsu has gotten a two page spread and this one only got one? I think its obvious it won't be as large as any of the other worlds.