Peter Debruge Chief Film Critic In “The Successor” — a provocative psychological thriller with a lot more actual psychology than the genre typically offers — Paris-based fashion designer Ellias Barnès (Marc-André Grondin) stands on the precipice of a breakthrough in his career. He’s poised to take his place as creative director of the fashion house Orsino, following the death of its eponymous founder. If this were a tale of corporate ambition (à la “Succession”), or perhaps a Roman palace intrigue, here is the moment that Ellias would assume the throne.