Most films with as many main characters who are not superheroes do not end up as well as The Avengers. With over 50 years of history and back story for each of the characters and more than a few fans who are waiting to be satisfied by a film adaptation this film has more strikes against it than for it.
It just so happens that the good things about The Avengers include The writer/director, the script, the actors, the effects,…
I love this movie more so for its great parts rather than its good whole.
I wish the characters had a little more depth to them, but the movie as a whole is trying to do something other than that, which is amazing, but still dampens the characters a bit.
I won't say more other than if you like horror movies then this is a must see, but be ready for it to be a lot more than that.
If you don't like horror movies, meh.