Palme d’Or laureate Gus Van Sant’s “The Sea of Trees” and Justin Kurzel’s “Macbeth” will jazz up the 68th Cannes festival, the glittering cinema showcase to which Woody Allen returns after a three-year hiatus. Matthew McConaughey and Naomi Watts both star in Van Sant’s enigmatic tale of a suicidal American meeting a Japanese in a forest, while Michael Fassbender plays lead in Kurzel’s adaptation of William Shakespeare’s “Macbeth”, which also stars Marion Cotillard.