Next month, Marvel Studios will start production on Avengers: Infinity War, which is expected to bring the entire Marvel Cinematic Universe together.
It is certainly possible that they could join forces in Avengers: Infinity War, but until Marvel unveils an official cast list, nothing is set in stone.
Jeremy Renner wouldn’t offer any specifics on what Hawkeye might be up to in Avengers: Infinity War, but he did say how excited he was to start filming next year with a “giant cast.”
The back-to-back production on both Avengers: Infinity War (May 4, 2018) and the currently untitled Avengers Sequel (May 3, 2019) is expected to last a whopping nine months, under the direction of Anthony Russo and Joe Russo.