it's about Thor, The Incredible Hulk, Iron man, AND Captain America! DUH!!!!!!!!!!!!!!!!!!!!!!!!!!! so obvious!!!!!!!!!!! don't tell me i forgot about black widow or hawk eye cause they aren't as important about the guys that had movies made about them!!!(got the idea from the all amazing man, NIGAHIGA!/Ryan Higa. look him up he is meraculous!)
Typically, it is about all those superheroes having to work together, forming 'the avengers' to save the earth that is threatened by Loki and his alien-army.The individual movies Iron man, Thor, Captain america etc are like prequels to that containing info that you later see on the avengers, so it is useful to watch those to get it better...However for me,the little psych, it is all about Loki!:P Not paying much attention to the rest...ok maybe a little to Tony Stark (iron-man). Why? Because,Loki is so awesome it took all 6 of them to beat him (very convenient twist of course,with hulk)... *Stops going on about Loki,everyone is tired of it*