I had seen all the trailers of The Amazing Spider-Man before its release. In one of those trailers Uncle Ben (Martin Sheen) says to Peter,

Do you have any idea what you really are?

This seems to imply that Uncle Ben knows about Peter's identity. This would have been a huge spoiler. But when I saw the movie, there was no such scene.

Do the filmmakers discuss such spoilers with some of the audiences and see if they like it and then change it accordingly? Or was this scene cut for other reasons?