The trailer is going to have to make up for a lot. Whether or not the film is any good, I'm not convinced that this movie can make any money. In a summer where every weekend another huge anticipated tentpole is coming out, waiting until 5 months before the release date to start hyping a movie was a bad move.
And I think when most of the general public thinks "X-Men" they think "Wolverine." How an X-Men movie will do without Logan/Hugh Jackman all over the ads will be interesting. My hopes are high for the movie, my expectations are low for the box office.