While there are some hero and villain duos that only the most die-hard comics fans would know, there are the iconic, epic Marvel Comics rivalries that have not only been ingrained in popular culture but have shaped comics history. When one says, "Marvel," it's hard not to imagine Spider-Man battling the Green Goblin. The same could be said for many of the renowned rivalries between a special selection of Marvel heroes and villains. These epic rivalries are impactful for a number of reasons. One reason is that each rivalry set in motion a trend that would go on to be...