When I was asked for my favorite discoveries at Cannes this year, “the Travolta” was high on the list. Propeller One-Way Night Coach (2026), John Travolta’s feature directorial debut, premiered on the frantic first Friday night, when no one knew exactly what to expect. Before the screening, and following a highlights reel of the star’s career, Thierry Frémaux bestowed an honorary Palme d’Or on…