What are some interesting plot ideas for Winter Soldier crossover fanfiction?

One idea could be a story where Falcon and Winter Soldier have to team up with an unexpected ally from their past. Maybe an old enemy who has a change of heart and holds the key to stopping a new threat.

Another interesting plot could be centered around a new threat that specifically targets Sam and Bucky because of their connection to Captain America. This threat could be a powerful and mysterious organization that has been observing them from the shadows. The story could focus on how they uncover the motives of this organization and fight back.

One idea could be that the Winter Soldier has to face his past selves in a dreamscape created by a new enemy. Another could be a story where he teams up with a young mutant who can see his hidden memories and they go on a journey to uncover the truth about his pre - Winter Soldier life. And a third could be a story where he tries to adapt to a normal life in a small town but his past keeps coming back to haunt him.

One idea could be that the Winter Soldier falls in love with a scientist who is working on a project to reverse his brainwashing. As they work together, they develop feelings. Another is that he meets a girl who has the ability to see people's pasts through touch, and she helps him come to terms with his own past while falling for him.

A plot could involve an alternate universe where Bucky was never captured by Hydra. He and Steve continue their adventures together, fighting different villains. Or perhaps a story where the Winter Soldier is sent on a mission to assassinate Steve, but at the last moment, his true self starts to break through and he has to fight against his programming to save Steve.

A plot could revolve around Black Widow and Winter Soldier having to protect a young mutant who has the power to expose a global conspiracy. Their different skills and experiences would come into play as they face various threats. In this fanfiction, they might also develop a deeper understanding of each other's traumas along the way.

One idea could be exploring Sam's journey in more depth as he adjusts to being Captain America. Maybe he has to face some old foes who don't believe he's worthy of the shield. Another could be a team - up mission between Falcon and Winter Soldier that goes awry, leading them to rely on their friendship to get out of a tough situation. Or perhaps a story where they discover a new threat to the world that is related to their pasts.

One plot idea could be that the Winter Soldier is on a mission and accidentally crosses paths with She - Hulk. She - Hulk initially mistakes him for a threat but then realizes he's more complex. They end up having to team up to take down a common enemy, like a new super - powered criminal organization that's causing chaos in the city.

One idea could be that they are on a secret mission together. The Winter Soldier's past memories start to resurface during the mission, and Black Widow helps him deal with the confusion and the emotional turmoil. They gradually develop a deeper connection as they rely on each other's skills.

Perhaps in this fanfiction, the magic in Harry Potter's world is used to either create or control the Winter Soldier - like enhancements. For example, spells could be used to enhance physical abilities or manipulate memories, similar to what was done to Bucky Barnes in the original Winter Soldier story. This could lead to a whole new set of plotlines and character interactions.