I would think 3. Because you are having to deal with having to bring up the Assassin's, deal with Demond and his problems and killing _________ someone within the game. Haven't gotten too far in it so I do not know what happens, but I am looking forward to it. If they would have done more with Altair, maybe a origin story or something, i could disagree with myself here. Ezio was purely revenge for his family and that has been done before in games.