I have not seen it, but probably will.
Although I did like the first Avengers movie.
It seems like A LOT of these comic book movies (X-Men, Spider Man, Batman, etc....) are making a lot of money at the box office in the last few years.
Comic books, because they have become much more sophisticated mediums to tell serious stories, their movies have become a genuine genre onto itself.
I remember a time when Hollywood avoided comic book movies because they felt they were money losers.