Mr. Zipper wrote:
Looks promising, however the proof of the pudding is always the story.
I'll remain cautiously optimistic.

I find the best movies are those with the best character development. That is why #2, #3, etc... are usually not as good - they are just stories and we already know the characters. If you watch the interviews on an Incredibles DVD the writers mention they probably won't do a follow up because the character development is finished, and that is what makes the story.
Since all the characters for the Avengers movie are already developed in their own films, I don't have high hopes unless the story is excellent or they focus on the relationships between the characters.
Mike