Near the end of the trailer, Xehanort looks up from his "friendly" chess match to gaze at the mantle, upon which a familiar keyblade hangs. As he stares on reverently, he remarks that "the future . . . it's already been written." Destiny is a pretty big deal to Master Xehanort, playing into his big plans for the Keyblade War.
In a scene exclusive to the 2.5 HD ReMIX, Young Xehanort mentions that his older self's keyblade is the most ancient of all. This appearance suggests that the keyblade was not originally Xehanort's, but the sixth Foreteller's, which has yet to be shown in-game.
What were your favorite moments from E3's Kingdom Hearts III trailer? Which features struck you the most?