There are too many damn movies out on the market that copy each other! Do the movie writers have a basic "general action movie with lame story and a small romantic theme" guide for all movies done now? Two movies like this are You Don't Mess With The Zohan and 21 are great examples. General action for both, in different ways but they are similar, with a lame story and a small romantic theme. BAM! They both pulled a large amount of money. Why? Because people nowadays are sheeple that will go see anything that comes onto the TV screen.
This is where we loose good movies, like The Dark Knight, to loads of crappy movies, such as Tropic Thunder, because all the sheeple want is a basic "LMFAO" movie that requires no effort of thinking about the plot or storyline. Thats why The Dark Knight is different. It has a story, and a pretty damn good one at that. It's not The Godfather like, but it still is much better than most movies made now.
Then there's the basic stoner comedy, which I won't even get into because some of those are really good and will actually pull more money than the general action movie because... IT HAS A STORY! Drama's... I can't stand them.