The Russo Brothers have released a video, teasing a prop for Avengers: Infinity War.
In the video, a 3D printer constructs the mysterious prop.
The Russo Bros. have posted puzzling messages before.
Last month, they posted an image of an explosion, no context given.
The duo directed Captain America: The Winter Soldier and this year’s Captain America: Civil War.
Marvel has a full slate of movies in the coming year.
Guardians of the Galaxy Vol. 2 opens in theaters on May 5, 2017. Spider-Man: Homecoming follows on July 7.
Thor: Ragnarok opens on Nov. 3 with Black Panther hitting on Feb. 16, 2018.
Avengers: Infinity War hits theaters on May 4, 2018.