Okay a lot of them are great and are good previews for up and coming films.... but does anyone agree they sometimes ruin parts of a film that would have been great to see first time during the actual movie....

example...

Phantom Menace(i know it wasnt very good at all)- darth maul in *stance* with his lightsaber turning into a double light saber would have been great to see first time in the film rather than it being advertised everywhere...