https://www.cnet.com/news/avengers-4-endgame-trailer-has-arrived-title-poster-beardless-cap-hawkeye-ronin-shuri/

The dark trailer opens with Iron Man in space, in a ship he presumably found (and/or cobbled together) while on Titan, waxing poetic about Infinity War's devastating Snappening in a recording meant for fiance Pepper Potts (Gwyneth Paltrow). Tony Stark (Robert Downey Jr.) seems like a beaten man who's accepted his fate. "Part of the journey is the end," he says.

"Thanos did exactly what he said he was going to do," Black Widow says. "He wiped out 50 percent of all living creatures."