The story here is absolutely big enough to justify the gathering of the team and manages to keep you engaged the whole time... and, I dare to say one part might even tempt you to shed a tear. It takes elements from both the classic Avengers stories and the second volume of Mark Millar's The Ultimates. The mischievous Loki (Tom Hiddleston) is looking to conquer Earth, and to do so, he's aligned himself with an alien army (I won't spoil who they are). With the tesseract (cosmic cube), Thor's "brother" is a cosmic force that would take a miracle to stop. Luckily for us humans, Nick Fury (Sam Jackson) has this little thing called The Avengers Initiative on file. And yes, this movie positively lays out the groundwork for a follow-up.
Regarding the rest of the talent, no one really falls short. We've already seen most of these actors in their respective roles before and they do every bit as well, if not slightly better due to the sharp writing giving them more to work with. Robert Downey Jr. continues to bring the laughs as the sarcastic Tony Stark, Chris Evans pulls off the confidence Captain America requires, Tom Hiddleston continues to make Loki the most interesting Marvel Studios villain to date, so on and so on. If they're not exactly like their comic book counter-part, then they're certainly close enough to make you feel as though they've been stripped from the
source: my blog