That's right browncoats, Captain Mal has joined the cast of James Gunn's superhero comdey Super alongside Rainn Wilson, Liv Tyler, Ellen Page, Kevin Bacon, Michael Rooker and Linda Cardellini.
Super tells of a down on his luck joe average called FrankD'Arbo (Rainn Wilson) who dreams of
becoming a superhero called Crimson Bolt after his bored wife (Liv Tyler) is charmed by a suave drug dealer (Kevin Bacon). Crimson Bolt has no powers but only a lead pipe as a weapon and a psychotic sidekick in the form of Ellen Page.
Nathan Fillion plays "the pop icon responsible for Frank's desire to become a superhero"
Apart from that i don't know much else except that it's great casting all round. Fillion is totally magnetic on screen and by rights should be a huge star.