Owen Gleiberman Chief Film Critic A year ago, the Cannes Film Festival presented the world premiere of what was widely taken to be Jean-Luc Godard’s final film. He had died by assisted suicide eight months before, and the 20-minute-long “Trailer of the Film That Will Never Exist: ‘Phony Wars'” felt, by nature, like the aestheticized version of a last will and testament. It was a collage film, and it was (surprise!) oblique, yet it offered tea leaves to read about Godard’s state of mind as he prepared to leave the world.