Armed with very few facts, on face value, I think this is a poorly considered idea.
I'm sure this has been discussed in the various post 911 threads previously, but surely:
If the flight control system has a back door remote override system, then the terrorists don't even have to be on the plane, right?
I wonder whether the fact that this would be much easier to implement in Airbii is in any way related to the fact Airbus is on the project team? If they made this idea 'de facto' just think how much hassle that would give Boeing in terms of compliance mods!