WI the passengers were able to retake the plane? There was a pilot on board, could they have landed the plane?
I believe an episode of Mythbusters showed Adam and Jamie able to land a smaller plane (in a flight simulator) using only instructions radioed to them by an air traffic controller. A commercial jet is a good deal more complicated, but it would certainly be possible, providing the passengers had been able to get control of the plane above a certain altitude, which would've given them time to get the instructions they needed from the ground.
It's at least possible enough not to require ASB intervention. I imagine the person who actually landed the plane would be regarded as a Chesley Sullenberger-esque figure, while the passengers who assisted in taking down the hijackers would be doing a LOT of speaking engagements, getting the Medal of Freedom possibly, etc.