This kind of reminds me of that IMDB Top 250 Mash-up. Basically, some wonderful Internet person out there took what seems to be nearly all the movie trailers of 2012 and turns them into one massive trailer for the year. They did a good job of it too.
It would be interesting to see this same person do something similar for each year going backwards as far as they can. It'd be cool to see how movies (and how we try to sell them) have changed over the years. I'm guessing a lot more CGI. Get on it, Internet!