im pretty sure Xehanort said he had two of the seven. mickey (in the same video) said that six are: Riku, Sora, Mickey, Terra, Aqua, and Ventus. Xehanort had Sora and Terra. yes, the seventh is most likely lea or kairi. as for the 13 darkness; I. old man xehanort II. Young master xehanort III. ansem, seeker of darkness IV. xemnas V. braig VI. isa VII. Vanitas? VIII. terra/xehanort? (terra and terra xehanort could both be alive at the same time i think. (Lingering sentiment could be the light, and the terra/xehanort from secret file of BBS could be the dark.) IX. ??? X. ??? XI. ??? XII. ??? XIII.???