The credits for “Ninja Assassin’’ list two screenwriters and one director. But it’s fair to say the movie has come straight out of a box. Cobbled together from the instructions of assorted Hong Kong gangster bloodbaths and whatever the French superproducer Luc Besson did last, this long, thanklessly repetitive slice-kick-and-shoot-’em-up has nothing to offer but the aggravating awareness that Jet Li and Jason Statham have done it better.
“Ninja Assassin’’ presents the young martial artist Rain. He has one name, one facial expression, and many ways to dodge a bullet. With a modicum of charisma, Rain plays Raizo, a top assassin who finds himself working against the ninja sect that trained him as a boy. As a man, Raizo is stealthy and taciturn, spending most of the movie headed toward various confusingly assembled, digitally enhanced showdowns set in such inevitable locations as empty warehouses and anonymous office buildings.