It's always been a shame that Jackson hadn't had a concert film on par with Prince's Sign O' the Times. And from the sparse opening rundown of "Wanna Be Startin' Somethin'," with huge musical sections still missing, it's clear that this won't be it. An assembly of performance rehearsals, classic archival footage and heartfelt confessions, This Is It finds High School Musical director Kenny Ortega instead building a monument to Jackson's skill. It's musically impassioned, and at its most interesting, a look at behind-the-scenes showbiz hierarchy (Jackson is demanding, but he never skips a "thank you"). It's Ortega's understanding of Jackson's artistry that's a little shallow. The singing and dancing is unmistakable, but MJ was also set apart by his populist messages of cultural change, social acceptance and racial identity, exemplified in his best long-form videos ("Thriller," "Bad," "Black or White"). His views on the environment expressed here are sincere but not enough. Considering Jackson's film legacy when he was alive, This Is It will only settle for being a touching shrine.