It's getting clooooser. EW has a short interview with Charlie, in which he talks Ending Things. Also a couple of stills from the film that I don't think I'd seen before.

“I don’t set out to do a mindf---,” the Oscar-winning filmmaker says. “I’m not setting out to do something that ‘tops’ some sort of brainteaser I might have done before. But there’s no question that I’m trying to build on the stuff that I’ve already done. [...] Loneliness and hopelessness and regret — these are things that are part of the fabric of this film." (Source)