User blog comment:Subject 16*/Assassin's Creed: Revelations - News/@comment-3542238-20110507180721/@comment-3519940-20110509212342

Since we might see Desmond's past, and Bill Miles is William M., maybe, William is Desmond's brother and he is Subject 16 since they are both assassins. I mean, there is a big possibility considering they have common ancestors, i.e. Ezio Auditore Da Firenze.