Neal Justin's TV picks for Sept 12-13: 'Project Greenlight,' 'Johnny Cash: American Rebel,' Carrie Underwood

Modern country tends to ignore its predecessors — with one notable exception. The new documentary "Johnny Cash: American Rebel" is part of a weekend-long tribute to the Man in Black with commentary from Sheryl Crow, John Mellencamp, Merle Haggard and Rosanne Cash. 8 p.m. Saturday, CMT

You don't have to give two whistle toots about the Dallas Cowboys or the New York Giants to tune in to "Sunday Night Football," thanks to a new opening theme featuring Carrie Underwood and 11 NFL players, including the Packers' Clay Matthews. Thankfully, the NFL has forbidden the linebacker from sharing his version of "Good Girl." 7:20 p.m. Sunday, KARE, Ch. 11

Matt Damon and Ben Affleck reunite as producers of "Project Greenlight," the long-dormant series that documents the nurturing of a new filmmaker. This time around, the selected director will toil under the guidance of the Farrelly brothers ("Kingpin") and producer Effie Brown, who previously worked on "Dear White People," which was shot in Minnesota. 9 p.m. Sunday, HBO

Neal Justin