A lot of this film reminded me of Akira Kurosawa's masterful Ran. In that film, the Lord Hidetora says alone a man is weak, but together is strong. This is the definition of the Avengers, Earth's mightiest heroes.
I have to praise Joss Whedon's script, chock-full of pop culture and one liners. In a scene, Tony Stark/Iron Man calls Thor Point Break. If you know the backstory, Thor does look like Patrick Swayze.
In another scene, the savvy Stark calls Hawkeye 'Legolas'. Captain America gets his chops in, telling Hulk at the end to 'SMASH'!