It would be terrible if the game ends with a more confusing ending than ACB. I'll take a guess at what the ending of AC3 will be. Lucy will still be alive, but she was transformed into one of TWCB by a piece of Eden. Juno then comes and kills Lucy for real this time (just because). Desmond, who is now angry, finds a new hidden blade with a built in machine gun and laser, who goes after Vidic and his baton-wielding people. Then Desmond learns that the only way to save the world is to do something completely random like killing all of the Assassins. That's the end of the game. Judging by the previous endings, mine sounds reasonable, doesn't it? Just joking of course.