This is a Marvel version of a thread that was started over in the DC Universe. I feel like Marvel as a whole is even more affected by this by just how many characters have origins connected to major real-life events. It's pretty funny just how many characters from the Timely era have some form of immortality. It's as though we never left there.

At least Captain America has the "man out of time" character trait, so he can be placed anywhere. The problem comes from characters like Black Widow who are constantly portrayed as being in their mid-to-late thirties despite being part of organizations that went defunct before they even went through puberty.

The Fantastic Four got their hype from the space race. Ultimate FF modified it to extradimensional travel, but it doesn't have the same relevance that it had with the readers of the 1960's.

Many adaptations ignore Hawkeye and Nightcrawlers experiences with circus performers since circuses as a whole have lost a lot of their prestige.