A cool new fan-created poster sets up Jeremy Renner in his own Avengers: Infinity War spinoff as Ronin.
The notion that Hawkeye will evolve to become Ronin (in whichever way) in Avengers: Infinity War or its still-untitled sequel is proof that the Russsos are planning to create a personal story arc for him in the films.
We know that prior to the events of Infinity War, Clint is already a retired superhero thanks to the release of the Avengers: Infinity War Prelude comics which basically catches up on what everyone has been doing since we last saw them.
Rumors have been fairly persistent about the bow-wielding marksman assuming a new alter-ego since set photos revealed a new suit and haircut for Hawkeye.