Movie Trailers

I don't know about you, but when I go to the movies I love to get their early enough to see the trailers. The sneak peak! Or in some cases these days- the whole reveal in under 3 minutes. What's up with that? Shouldn't you want to 'tease' the audience into going? I mean if you give away the entire plot and all the good points in the movie why go? For instance "The Breakup" with Vince Vaughn and Jennifer Aniston- yes I know that came out awhile- all the hilarious bits were in the trailer. Or "What happens in Vegas" even in the trailer it shows them finally winding up together (now granted that's the formula for romantic comedies but it doesn't neccessarily need to be, but if you show me in the trailer there's no room for wondering). I just happened to see a trailer for a movie called "Obsession" this morning. It stars Beyonce and Ali Larter (Heroes). The trailer WAS the movie. It too revealed the ending fight between the two ladies and left one second to guess what happens. Of course if you saw "Fatal Attraction" just put in Ali for Glenn Close and Beyonce for Michael Douglas' wife and there's your movie.
Another movie coming out with Dustin Hoffman and Emma Thompson looks really good, and I am sure will have some witty dialogue and cute moments but the trailer tells you the entire movie!! (It's called Last Chance Harvey and if you haven't seen the trailer go see the movie).
One trailer that WAS doing well in not giving too much away is Seven Pounds (will smith). It makes you wonder what he did wrong to need to change these peoples' lives. UNfortunately I saw a 3rd cut trailer which, to me, looks like it shows what he did- thereby ruining THAT mystery moment- but I am still interested in the movie.
So comedies give away the good jokes, what about action trailers? You guessed it, the best action sequences. Or mysterious thrillers- the face of the beast, killer, etc.
I guess the thinking of the studio suits is that by showing all the cool stuff it will entice audiences. Sure it may and will but then watch how fast the audience drops off the next weekend because they tell everyone all the good stuff was in the trailer.
And another thing...trailer? So shouldn't it be at the end of the movie? I think at one time it was. Anyway be weary of the trailers!!!