How conversant does a movie-goer have to be with “The Iliad” or “The Odyssey” to enjoy Uberto Pasolini’s “The Return”? At the Upper West Side preview for the film, an executive from one of its production companies, Bleecker Street Media, introduced the picture by testifying to the ubiquity of Homer’s seminal works. Every student, he averred, had been assigned to read the epic poems at one point or another in their academic lives.