Oh, this looks good!
I'm still concerned about it being a "celebrity heavy movie". They will need to focus on two or at most three of the strongest Avengers -- character-wise -- likely Iron Man, Captain America and maybe Thor. If they try to give all six equal time the movie will probably come out unevenly paced.
Watchmen is an example of a superhero film that successfully charted the pitfalls of an ensemble cast. However in that one we didn't have any pre-conceived ideas of the characters and ultimately the story really was mainly about two or three of the heros.
"Reality is that which, when you stop believing in it, doesn't go away."