This is the first Assassins Creed game I have played. Obviously the question includes spoilers:
In the final scene that takes place in present day, John (the IT guy) express his anger and disappointment that you were not possessed by Juno. I gather that Jon is a reincarnation of Bartholomew Roberts, and he seems ready to kill you out of anger with a syringe of something foul. It turns out however, that the shot John gives you was far below the lethal dosage.
What was the point of the syringe if John did not intend to kill you?