Over the course of nearly an entire century, the Marvel Universe has captivated audiences, and all without letting go of its most iconic characters. That doesn't mean that newer, younger heroes haven't emerged to forge their own legacies along the way. However, considering how long many of Marvel's most iconic figures have been in action, is striking that so few have retired. Even with the sliding scale of time inherent to long running comic book titles, this fact remains as strange as ever.
Source：https://www.cbr.com/secret-wars-battleworld-avengers-history-lore/
