Bad title
Given that many bad films go on to become blockbusters anyway, I can't help but conclude that the choice of title had a lot to do with the disaster:
1) It's derivative of other "Mars..." and "X needs Y" titles, meaning that the reflexive instinct of the casual browser of movie listings is that the film will be, at best, equal to, but more likely worse than, the other films he think is being referenced. If his opinion of "Mars Attacks!" was "myeh", then this gets a pass.
2) No movie with the word "Mom" in its title has ever done that well. There are few words in the English language less likely to push the average person's entertainment button hard enough to prompt them to get up and drive to a theater.
3) ____________