VIDEO : 'Avengers: Infinity War' Directors Release Cryptic Pic Teasing 'Avengers 4'

The "Avengers: Infinity War" directors dropped a photo from the set of "Avengers 4" teasing the movie. Anthony and Joe Russo challenged fans to "look hard" at the black-and-white still. Fans think the name of the movie is hidden in the photo. They think it could be "Endgame" or "Avengers: Assemble." Take a closer look. @therussobrothers/Instagram A lot of fans think the title "Endgame" is etched throughout the photo. Another believes they see Marvel character, Beta Rey Bill, on the back wall.