Ok! i have just made a breakthrough while reading over the interview with the director. Although this has been stated before i now have proof. On the third question from the bottom, it says that in Ansems other report #13, ansem ponders on how Xehanhort was able to open the door to Hollow Bastion. The answer is so simple now. Xehanhort was the keyblade weilder before Sora. Also everybody speaks of how the keyblade weilder brought chaos and destruction to the worlds, well they were in fact speaking of Xehanhort. There you go. If we continue this research at this pace, we should have the base of the story down in no time. So far we have compiled that the next game: (if there is one)
-It will take place in the past,
-Xehanhort was the previous keyblade weilder,
-The object in the background is the dragon from the battle with Xemnas,
-The keyblades that we see in the movie probally are turned into keychains because they lack them and they resemble keyblades from the games,
-Sora's, mickey's, and Riku's keyblades played a great role in the past,
-Sora, riku, and kiari are NOT the three in armor,
-The cross in the roads resembles the one riku passed through, just larger,
-The letter that sora, riku, and kairi get from mickey *MAY* hold some signifigance to the keyblade war,
-Xehanhort is found near death by ansem (injured from the war).
That is what we have compiled so far, if i have missed anything feel free to add it!
Also in the interview the director said that the game takes place in the past, but also could be in the future, this could lead to another keyblade war, or the most likely thing would be that you get to play as sora in the future and discover more about the war. As you discover more, you play it out as someone from the past. That would be pretty awesome!!