This looks like a whole lot of delightful silliness. Knights of Badassdom is directed by Joe Lynch (Wrong Turn 2: Dead End, Chillerama), and written by Kevin Dreyfuss (who?) alongside Matt Wall (Saint John of Las Vegas, Session 9).
The film is about live-action role players whom mistakingly summon a demon from Hell and are forced to deal with the consequences. Sounds like fun.
The hilarious Peter Dinklage (Game of Thrones) will dawn or sword yet again for the movie, alongside Summer Glau (Terminator: The Sarah Connor Chronicles), and Steve Zahn (Sahara, Saving Silverman). Knights of Badassdom gets its first official trailer (below).