- I think that was because Sora had to decided whether to save those 'connected' to him or not, and he definitely decided - because he replied "Yeah" to Riku.
- I also doubt it takes place between End of KHII and KHIII because Sora and Riku in the trailer are both seen in there KHI forms, and i dont think they'll place any side games between KHII and KHII, because there isn't anything to really tell the story of as KHII was the conclusion kind of, as Sora gave the luck charm back to Kairi and returning home, except for Sora saying yes - which i believe we will find more out about this in KHIII, there isn't anything worth creating.