Easter eggs are a cool surprise no matter when they show up – and in the Marvel Avengers franchise, that’s quite a lot. When you’re building a cinematic universe that involves several different factions, let alone multitudes of characters, their origin stories, and all the inherent details, Easter eggs can help build up some common ground between them all. A passing reference to another superhero or story line keeps fans in a state of anticipation about the next project coming down the pipe.
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