So I was looking for some stationery yesterday, so naturally I went to my local book store. I couldn't get what I was looking for, so I spent a while looking at the DVDs (I'm almost positive that book stores will be the cities of the future; all they need to do is offer lodging, and possibly a pub, and there'll be no reason to leave). While I was there, I noticed a trend appearing on newer DVD boxes.
The formula goes like this:
Close up headshot of lead actor either staring at or facing a point 20% from the front + (1 part perplexed expression + 3 parts steely determination) + an explosion somewhere on the case = success.
Here it is in Michael Clayton:

And again in Déjà Vu:

The Constant Gardener had a fire instead of an explosion, but it's still colourful, hot and dangerous:

Although Die Hard 4 deserves a bit of slack, as nobody ever expected it'd have anything else on it's cover:

And whilst you may think this is a recent phenomenon, I've done some research and it turns out that films have been following this formula for years, it's just that nobody has noticed: