When Disney+ launched we got our first peek at concept art of Wyatt Russell as John Walker aka U.S. Agent for their upcoming Marvel Studios series The Falcon and the Winter Soldier on the docuseries Expanding the Universe, now thanks to Page Six, we get our first look at Wyatt Russell in costume during production.
— Page Six (@PageSix) January 21, 2020
In the image, it looks like the government is against Sam taking on the mantle of Captain America and it appears that they have taken the shield away from him as well, which was passed on to him by an older Steve Rogers at the end of Avengers: Endgame.
John Walker was first introduced in the comics in 1986 as somewhat of a villain called Super Patriot. Later on, he replaces Captain America as a government-sanctioned superhero and eventually becomes known as U.S. Agent. As we can see from the images he bears a striking resemblance to Captain America, added he is carrying a gun if you look closely.
Anthony Mackie and Sebastian Stan are reprising their roles as Sam Wilson and Bucky Barnes. Emily VanCamp is also officially to return, VanCamp originated the role of Sharon Carter in Captain America: The Winter Soldier before reprising her part in Civil War. Daniel Bruhl will also return as Baron Zemo. Also joining the series in unknown roles are Desmond Chiam, Miki Ishikawa, and Adepero Oduye.
All six episodes of the miniseries, which will air in August 2020, will be directed by Emmy nominee Kari Skogland (The Handmaids Tale, The Punisher), with Derek Kolstad (John Wick) apart of the writing team. There are reports that surfaced that the series could have some sort of massive viral threat, and will introduce the villain turned hero team The Thunderbolts.
Source: Page Six