The teaser for David Fincher’s upcoming “The Social Network” hit the net at Mashable yesterday. If you’re somehow unaware, it’s a biopic (weird to say that, no?) on Facebook founder Mark Zuckerberg from a script by Aaron Sorkin, based on Ben Mezrich’s novel “The Accidental Billionaires.” There is no footage, just a lofty tease that gives the impression the film will be, shall we say, quite sincere. It’s left to be seen how Columbia flacks and the 42 West component behind producer Scott Rudin (as always) will coalesce during the season, but it’s certainly a sight-unseen favorite for the race. Check out the trailer by clicking the image below or watch the embed after the jump.