I'm sure conspiracy theorists will have a field day with this, what with him reportedly killed, and so quickly buried, and at sea, instead of being captured and put on trial. There could certainly be the question of if he is really dead. I know it's proper in their religion to bury a body within a day, and no country supposedly would want to have his remains, hence the quick burial at sea, but you can't deny that some people will have doubts...
And without a leader, doesn't that mean Al-Qaeda could possibly have a crazier replacement, or even without a leader, if they still have the means to blow stuff up, couldn't that mean they could still be a threat, with a motive of retaliation?