Directors Joe and Anthony Russo are letting a picture say a thousand words as they announced the start of production on Untitled Avengers by posting the photo above on Facebook.

A gloved hand holds up four fingers, signaling (obviously) the fourth Avengers movie, which comes out May 3, 2019, just one year after Avengers: Infinity War hits theaters on May 4, 2018. Untitled Avengers is the culmination of the first three phases of the Marvel Cinematic Universe and The Russo Brothers are billing this “Beginning the end.”