So they're data worlds made from real worlds? Is it the real Wonderland/Agrabah/world we already visited or just a data version of them like Coded?
Spoiler ShowFrom what I remember during the story of the browser game it was projections of future worlds brought to life by the BoP. And then when Unchained X starts they are data worlds in a datascape that the characters can access from Daybreak Town. So it looks like they are more like the worlds from Coded making Coded even more important than it was before. Thanks Nomura.
Spoiler ShowMaybe Yozora has the ability to see dead people? Perhaps Luxord told Yozora that Sora had the ability to save dead people and Yozora sought him out to save the Nameless Star? Yozora can see/communicate with the dead, but Sora can save them (and is also dead).
Spoiler ShowMaybe Luxord wants Sora and Yozora to work together? Thereby having Yozora encounter Sora in the Final World so that Sora's connection to him could be Sora's key to returning from the Final World?