I kind of anticipated and expected this. Iron Man was awesome, and THE best Marvel Comics superhero movie in my opinion. But it had the surprise factor on its side.
To illustrate my thoughts more succinctly, the following is from an e-mail review I sent to my friends after I saw Iron Man for the first time at an employee showing before the film was released to the public (my brother manages a theater):
"Favreau and Marvel Studios knocked Iron Man out of the park. But I believe that part of that is because no one knew how good Iron Man could be. Personally, I didn’t follow the development of Iron Man, so I really didn’t know much about the flick when I saw it. Sure I read the comic growing up, knew the character, and knew Robert Downey, Jr. was going to be good in it, but that’s all, and I was blown away upon seeing the completed film. I said earlier that Iron Man knocked it out of the park, but in my opinion, it was akin to a baseball player being called from AAA and hitting a grand slam at his first at bat in the major leagues. It’s totally unexpected, and a HUGE surprise".
It’s funny, I was flipping channels last night and caught Robert Downey, Jr. on Access Hollywood just as he was saying “the hardest part [about making Iron Man 2] was trying to catch lightning in a bottle the same way we did for the first one”. I'm paraphrasing of course, but you get the gist.
I still look forward to this movie immensely; in fact as a father of two young children, I hardly have time to see movies anymore, but I will definitely be there at the midnight opening.