Turns out even reality shows can get rebooted. Matt Damon and Ben Affleck’s Project Greenlight, which ran for three seasons before ending in 2005, will return to HBO next year — and details are starting to emerge. As always, filmmakers will compete for the chance to direct a studio film, with Affleck and Damon serving as mentors. But this time, all contestants will enter three-minute short films. (No screenplays: The winner will work from an existing script.) Greenlight has also linked up with Facebook so viewers can weigh in every step of the way. As exec producer Marc Joubert says, ”I think the show was ahead of its time when it was launched 13 years ago.” The folks over at Starz seem to agree. This fall, they’ll air their own filmmaking reality series, The Chair, from original Greenlight EP Chris Moore. And…action!