The newly released Avengers: Endgame poster for Russia features Scarlett Johansson in her role as Black Widow – the Russian spy-turned SHIELD agent – prominently at the front and center of the poster.
As could be viewed in the Avengers: Endgame trailers, as well as on the released movie posters – Black Widow is back to her classic red-colored hair in the final film, opposed to her blonde look in Avengers: Infinity War – signifying that she is done hiding.
Source: IGN.com Avengers: Endgame Russia Poster Leads with Black Widow