You want to see the latest film adaptation of Much Ado About Nothing directed by Joss Whedon. A.O. Scott writes in his review for The New York Times:
"You do not have to have stayed awake in your high school English class to know how it all ends. Shakespeare is an eternal rebuke to modern spoiler sensitivity. His audiences always knew how a play would wrap up, and they did not enjoy themselves any less. (Today’s movie audiences are the same but have been brainwashed to believe otherwise.) A good deal of the pleasure in “Much Ado” comes from the exquisite deferral of the inevitable resolution."