Sometimes a movie seems to have everything going for it. The concept, the talent, or the setting is amazing... then something goes horrendously wrong. These are all movies that SHOULD have been great but one or two things completely ruined it. Please add your own!
http://www.ranker.com/list/movies-that-should-have-been-great/jimjenkins,
Hamlet 2
A.I. Artificial Intelligence
Batman
But I'm a Cheerleader
Indiana Jones and the Kingdom of the Crystal Skull
Watchmen
X-Men: The Last Stand
The Hobbit: An Unexpected Journey
Prometheus
Burt Wonderstone
With that cast, that movie should have knocked it out of the park.