Looks like The Russo Brothers who are directing the next Avengers movie are trying to give us a clue for the as-of-yet unnamed film. Yesterday they posted this image via
Twitter with the captain "LOOK HARD".
Of course this has caused a lot of guesses from folks but I think it was
juliomaster who has come up with the best guess so far.
He points out the prop in the Russo Brothers' image is the same one we saw at Avengers HQ during Infinity War. Now what exactly that piece of equipment is or does is another question. Some have speculated maybe its some kind of mini-quantum teleporter like the one seen during the Ant-Man 2 after-credit scene, however that piece of equipment looked totally different.
Other theories is that the stuff in the image spell out something. There looks like an E to the far left of the image and the latter in the middle of the floor looks like could be a A. Maybe they have secretly spelled out the title for Avengers 4, who knows.
What do you think they are trying to show us here?