I saw The Incredibles at MGM, in the animation department.
If you are not sure where that is, it is straight ahead after you go through the big archway to the right of the Chinese Theater / Great Movie Ride building.
You may go in the wrong way, the door well to the right of the little arches, through the gift shop where framed pictures and cels are sold, and through to the back, this way you can skip the animation show and the wait in line connected with it. Not sure what hours they are there.