Once again, marketing a movie to be something that it's really not might result in more people seeing movie, but will definitely result in more people being disappointed.
Some of the movies I've enjoyed the most are the ones I went into with no preconceptions. Sometimes I'd never even heard of it before, so I watch it, watch the story unfold the way the director intended, and just let it take me for a ride. By not expecting anything in particular, I'm not going to be disappointed. The movie might still fail, but it will do that (or not) on its own merits, not because of too-high expectations courtesy of marketing.
Example: When my wife and I went to see Indiana Jones and the Last Crusade, it was a double feature with some movie we'd never heard of called Weekend at Bernie's. Yeah, everyone knows the movie now, but this was before it was officially released, test marketing. We figured two movies for the price of one, why not?
We had no idea. The Bernie gags have been done 1000 times since then, and never as well, but we laughed our asses off the entire time, as it kept getting more and more absurd.