Last year, a mysterious Twitter account appearing to belong to the Russo Brothers began tweeting seemingly random images during the production of Captain America: Civil War. There’s been plenty of speculation about whether or not the account is legitimate, with Guardians of the Galaxy director James Gunn tweeting that the Russos weren’t on twitter and the account was fake. Case closed, right? Except Gunn later deleted those tweets without explanation, and several images posted by the account definitely seem to have come from someone involved with the production.

Regardless, the same account is back at it now that production on Avengers: Infinity War is under way, tweeting this image this morning:

Like the images from Captain America: Civil War, it’s almost impossible to tell what exactly the blurry flash of light is supposed to be. An Infinity Stone? An explosion of some sort? A super-close up of a glass of lemonade? (We can’t be sure, but it’s definitely the last one.) The jury may still be out on whether or not this account has anything to do with the Russos, but either way it seems we’ll be getting new teases from this account in the coming months as Avengers: Infinity War and the untitled forth Avengers film are being produced.

What could this image possibly be? Is this account even legit? Jump into the comments below and let us know what you think!

Source: Twitter.