Here's the Trailer for the WikiLeaks Movie
As for whether the film will be pro- or anti-WikiLeaks, the trailer seems to play both sides. However, Assange himself has claimed to have read the script and called the movie a "lie upon lie" and a "massive propaganda attack on WikiLeaks and the character of [his] staff." Assange also refused to meet with Cumberbatch while he was preparing to play the role, though the two did email back and forth. Cumberbatch has, himself, made positive comments regarding Assange, saying "Assange made the most extraordinary contributions to human history by treating the Internet as a democracy."
The film's title is a reference to the name online journalists have given themselves, distinguishing them from the traditional media -- the fourth estate. It's due out in October, right in the middle of awards season.