AU in which Steve Rogers wakes up in the 21st century to find that a stash of love letters he wrote for Bucky (but never showed him) were uncovered in the 90s, causing controversy over Captain America’s public image. Moreover, this story of tragic, unrequited love in an intolerant past was later adapted into a hugely successful Oscar bait movie directed by Michael Bay, which absolutely dominated the box office.
Note: This is also an AU in which Leonardo DiCaprio has actually won an Oscar for his portrayal of pre-serum Steve Rogers.