Warner Bros.

Some moviegoers got a surprise sneak peek at Christopher Nolan's next film, "Tenet," on Thursday night.

The trailer — which is not yet available online — debuted before some screenings of "Hobbs & Shaw."

According to The Hollywood Reporter, the roughly minute-long teaser opens on a bullet hole in glass. Behind the glass is John David Washington ("BlacKkKlansman"). That shot is followed by the tagline, "Time has come for a new protagonist." Then, Washington examines the glass and the camera pans to reveal more cracks, presumably made from the bullet.

Notably, the title of the film (a palindrome) flips two of the letters upside down, reading as "TENƎꓕ"

Not much is known about the film, which also stars Robert Pattinson, Elizabeth Debicki, Aaron Taylor-Johnson, and (of course) Michael Caine. It's been described as an "action epic evolving from the world of international espionage."

But with rumors that the plot involves the time continuum, the use of the word "time" in the tagline, and the flipped letters in the title, Nolan may possibly deploy non-linear storytelling in "Tenet" just as he did in "Memento."