Yelena Belova will be the subject of speculation in regards to the role in the Black Widow movie as well as potentially playing the role since Avengers Civil War through Avengers End Game. Marvel could use her to bring the original Black Widow back at some point, and it is only speculation at this point based on things like the vest she wears, Black Widow having short blond hair for a period of time in the Avengers movies, interactions with Hawkeye and the lack of with the Hulk so time will tell. Marvel Knights Black Widow #1-3 will be the hot comics for Yelena Belova regardless of how Marvel uses her. Then Avengers 43 for Red Guardian and Avengers #195 and #196 for Task Master as well as Marvel Fanfare #11.