It's funny because I don't think many of us would cite Avengers: Endgame as the movie to watch in order to unwind. Other than the Ant-Man stinger at the end, the trailer for the film was emotional and bleak. It was also stressful and seemed way more likely to induce sweaty palms than feelings of relaxation. Although what David F. Sandberg is saying is that he simply can't relax until he has seen Avengers: Endgame and finds out Ant-Man's fate.