The caption reads, “As one story ends, a new one begins,” and it has Bruce Willis walking down what looks like a street, whistling “Ode to Joy,” the signature Die Hard tune. He eventually turns to face what looks like a handful of menacing figures on this shadowy street, and he starts to take his jacket off as the clip ends.
Article source: https://www.cinemablend.com/news/2557089/looks-like-bruce-willis-is-somehow-bringing-die-hard-back-and-fans-have-hysterical-guesses