What if John Walker never actually took the serum? Spoilers : r/MCUTheories
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The Falcon and The Winter Soldier: Is [SPOILER] really dead?
The Falcon and The Winter Soldier' Episode 4: Did John Walker take the Super Soldier Serum? | MEAWW
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John Walker, super soldier? Marvel comics explain 'Falcon and Winter Soldier's big twist
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Falcon and Winter Soldier theories: John Walker steals super serum | TV & Radio | Showbiz & TV | Express.co.uk
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