Well here is my short theory on who VAT's master could possibly be. MX and VATS master could be brothers because there is not evidence that proves that they are not nor any that proves that they are. I say this because VAT's master may of introduced MX to his pupels and MX may have taken interest in Terra and done something to Venn which caused a dispute to happen between the brothers. I have no evidence to prove this but it just seems right to me. Possibly at the end of the game MX and VAT's master have a big battle in Radiant Gardens which ends with MX being defeated but VAT's master is injured so badly that he gets amnesia and the only thing he remembers is Xehanort (because of the battle) and decides to make that his name and soon after he ends up being discovered by Ansem the Wise. Yes i said it i think that VAT's master is Xehanort and i know that MX looks really old and Xehanort looks really young but im just saying what i think is possible to happen in BBS. Please comment, give your thoughts about my little theory, and please don't bash me for stating my ideas for BBS.