They have the same color palette (blue, red, and white, of course), but Walker’s had a symbol that is a combination of an “A” and a star on the right side of his chest, in the middle of his helmet, and the back, and blue and red stripes across his torso, with the rest of the suit being blue. Walker’s Captain America costume was similar to that of Steve Rogers but different enough to set him apart from the original Cap. By the end of The Falcon and the Winter Soldier, Walker had found some redemption by helping Sam and Bucky, but his alliance with Valentina Allegra de Fontaine (Julia Louis-Dreyfus) continued, and it was she who gave him a new costume and identity: U.S. Frustrated, Walker made his own shield from scrap metal and his war medals and joined Sam and Bucky in their final battle against the Flag Smashers, still wearing his Captain America suit. Army whose achievements made him the chosen one to take the mantle of Captain America, but he wasn’t worthy of it, and after brutally killing one of the members of the Flag Smashers with the shield (this after the death of his friend Lemar Hoskins/Battlestar and after taking the Super Soldier serum), he was stripped of the title.
John Walker is a former member of the U.S. Related: Making John Walker An Antihero Ruins His Story Sam and Bucky joined forces to bring down a radical group known as Flag Smashers, but they also came across an unexpected obstacle: John Walker (Wyatt Russell), the man that the US government chose to be the new Captain America after Sam gave the shield up.
Set six months after the events of Avengers: Endgame, the series followed Sam Wilson (Anthony Mackie) as he decided whether to take the mantle of Captain America or not, and Bucky Barnes (Sebastian Stan), who continued to struggle with his past as the Winter Soldier and the consequences of it. First in line was WandaVision, and once it was over, fans moved forward with The Falcon and the Winter Soldier.
The Marvel Cinematic Universe’s Phase 4 has finally begun, and it won’t just focus on movies but TV shows as well, which will connect with the movies, further expanding this universe. The Falcon and the Winter Soldier introduced John Walker, the new Captain America who at the end of the series became US Agent, and the changes in his costume say a lot about his new role.