It's impossible to imagine a science audience is not excited about "The Avengers".  Marvel, who throughout the 1980s and 1990s could do nothing right, has now taken great pains to do nothing wrong.   "Thor" should have been the hardest but it was darn good and only the twin Hulk efforts could be regarded as something of a misfire.

I wouldn't have picked Scarlett Johansson to be Black Widow (Hilary Swank, obviously) and yet another Hulk can be annoying, but you can tell by the audience reaction that this is going to be pretty sweet.