The big news of the Biola Media Conference is that Brian Cox is no longer doing the voice of Aslan! Apparently he has lost some weight and his voice has changed.
UPDATE
Brian left the production because of scheduling problems.
He is currently filming Running With Scissors, which is live action, and his weight loss is certainly not affecting that production–and he is ON CAMERA.
Reportedly, Jason Isaacs, Timothy Dalton, Sean Bean, Gerard Butler, Ian McKellen, and Ralph Fiennes have all auditioned for the part. No choice has yet been made.