The movie’s catch line is "You Don’t get to 500 million friends without making a few enemies". The 500 million relates to the number of users Facebook currently has.
The movie is based on Ben Mezrich’s book The Accidental Billionaires and has a budget of 40 Million pounds. The movie is supposed to be a comedy one but will surely add to the ridicule Mark Zuckerberg is already a target of. The movie is produced by Kevin Spacey and is expected to be released this October. The film claims several things about Facebook’s history that might or might not be completely accurate but it definitely sounds like a fun thing to watch.
Now I am not sure why Sony chose Twitter to promote a movie based on Facebook, but whenever you visit twitter.com, you will see a sponsored listing for the hash tag #SocialNetwork. Sony Pictures are promoting the URL http://500millionfriends.com/ which in turn redirects to the movie website http://www.thesocialnetwork-movie.com/.
I am not sure whether Sony is also promoting "The Social Network" movie on Facebook too. You can watch the trailer of "The Social Network Movie" embedded below.