Aurora, He did a few times, the first when Lucy tosses the pg of the spellbook in the fire, the second during the undragoning, and the third when the kids go home.

I am ok with the lack of roar, but the moive would have been better with it. I sure hope disney didn't copyight it, or something werid.

I just thought of something - the first two movies leave you with a feeling that the Pevensies (or some of the Pevensies) will return in the nest movie. the roar, IMO, is a sign of Aslan's promise that they'll return. but in the end of VotDT, Lucy and Edmund are not coming back.....
just something I thought of

Wow! Liberty Hoffman, I thought about the same thing and I wrote it at Return to Cambridge (there is a link at page 1 of this discussion)

I did miss the roar.. i understand that the scene was solemn and roaring there could break that feeling, but in PC Peter and Susan were not coming back, Eustace comes back and they even mention Jill Pole cuz his mother calls him saying she is there to visit. I think the roar should have stayed, the Dawn Treader just sailing away does bring back that sense that Narnia is still there but still miss the roar.

If Aslan had roared in the final scene, I think it would have ruined the sadness of the scene. The kids were all so quiet and Edmund and Lucy were grieved. The scene was very well done in silence. It was the end of visits to Narnia for the Pevensies until The Last Battle. I think instead of hearing Aslan's roar, we just had to see the emotion of the children, since Narnia was so close to their hearts.