''Cuban hip-hop'' isn't a well-known subgenre, and El Cartel a trio of rappers making unapproved music under the thumb of Castro aren't exactly the Wu-Tang Clan. In a more open society, this game but muted documentary suggests, Mikki Flow, Soandry, and Magyori would be superstars; yet superstardom (in the maximalist American sense) is something they distrust. East of Havana picks at these politico-philosophical threads rather than pulling them, and the sense of a larger movement is fleeting. There's a beat, but we never quite see who's dancing to it. B-

