Title of the film is “Serenity.” Series creator Joss Whedon is scripting and making his feature directorial debut. All the actors appear to be aboard.
According to the article, “Forthcoming pic is set about six months after the TV show left off, and centers on two passengers on board the ship who attract trouble to the crew.” Oddly, the story mentions all of the regulars returning but Alan Tudyk and Ron Glass. Perhaps the reporter’s fingers got tired.