Malik
Superstar
Hollywood's a funny place. Studios will often purchase similar scripts or develop something in house. Screenwriters will write spec scripts based on what's sold or what's doing well.
So the market gets flooded with similar scripts. The flavor of the month. So what ends up happening is that we get a bunch of fukking fairy tale movies, a bunch of vampire bullshyt, found footage shyt, and very recently a few "Die Hard in the Whitehouse" type movies.
It would be one thing if the studios actually took time to get things right...but most of the time they don't. They are all trying to produce what's hot at the moment. So they rush it.
Jack the Giant Slayer had 3 writers from what I understand. The original writer (not sure if it was spec or studio assignment), someone who did a studio re-write, and then Bryan Singer's go to writer cleaned it up for him.
White House Down - coming out in June
Olympus Has Fallen - coming out in March
Same exact movie