John Walker’s Transformation
In the comics, John Walker loses his title as Captain America but gets to continue working as a soldier. The government fakes his death, and gives him a new identity as U.S. Agent.
Powers of John Walker
Artificially Enhanced Physiology: Walker enhanced his peak human physical prowess by injecting himself with the Super Soldier Serum, granting him superhuman level feats.
John Walker in the MCU
John Walker officially took up the mantle of US Agent in the Marvel Cinematic Universe in the final moments of Disney Plus’s The Falcon and the Winter Soldier.