Subject matter is being kept under wraps, but it seems a sure bet the project will turn out to be the tuner about Mormons on which the three creatives have been collaborating for some time.In my view Trey Parker plus religion equals can’t-miss comedy, and likely a show that will sell out so quickly most of us can never hope to see it. Find “South Park’s” hilarious 2003 episode about the Mormons, which itself features a memorable musical component, here. Find all of Variety’s story on the matter here. New episodes of "South Park" return to Comedy Central March 17.