I was able to enjoy it as a stand-alone movie. I know a lot of people are saying "What about the other Avengers? What about Shield?" I thought about it, but it didn't bother me that much. I wanted to see how Tony was going to use his wits to handle this seemingly unbeatable bad guy.
I think this will be a problem for all future Marvel movies. The Avengers set the bar sooo high, that expectations are crazy.
I was just praising this show a few episodes back of not slowing down even though there were 3 episodes to go but based on reading the wikipedia page of the original Scandinavian version all the best part are lifted directly from that.