Following in the noble tradition of "Sharknado," "Snakes on a Plane" and "Sex and the City 2," this elaborately executed nonsense is the kind of project where you just know that the title came first. "Batman Ninja" (or "Ninja Batman" as it's being called here) answers the question nobody had thought to ask: What East-meets-West mash-up would make even less sense than "Afro Samurai"?