DOCUMENTARY PREMIERE: Morgan Neville’s previous documentary, Won’t You Be My Neighbor?, was a fabulous appreciation and examination of children’s TV host Fred Rogers. (I appear in it briefly as a TV historian, but the movie’s terrific despite that small flaw.)  Now his new documentary, They’ll Love Me When I’m Dead, is a meticulous and utterly fascinating examination of Orson Welles’ final work in progress, a partly improvised drama called The Other Side of the Wind, about a film being made by an aging, once-powerful director. Neville approaches this like a detective, and tracks down old footage, older TV appearances, and Welles associates who give fresh interviews – including such unexpected but key witnesses as believe it or not, Rich Little. It’s another home run by Neville, and ranks alongside such great documentaries about unfinished films as 1965’s The Epic That Never Was (about Charles Laughton’s never-completed I, Claudius) and 2002’s Lost in La Mancha (about Terry Gilliam’s just-finished epic take on Don Quixote). And it really, really makes you want to see a finished assemblage of The Other Side of the Wind. And guess what?...