In that case, I wonder if Kevin Clash can somehow reveal to us what Clifford's cut scene was to have been like, since Kevin did say that Clifford would appear in the new movie.
Or someone could ask him what he knew about the Clifford appearance. He might have just been told about Clifford being there. But somehow I think it might be best to wait until after the movie's official release to ask him. I wonder what the terms are regarding performers and professionals discussing "spoilers" or other things they aren't allowed to discuss until movie releases.
Part of me wonders if maybe Clifford had a scene, with someone else performing and Clash being planned to dub the voice later, and then them being unable to work his schedule and cutting the scene as a result. I hope we can learn the deal soon enough.
Here's hoping the DVD release has a satisfying amount of bonus features, revealing everything we want to know.