As others have said, the Ivan Vanko story arc really doesn't go anywhere in the film since the Vanko character really does nothing throughout the majority of the sequel. So that dread was kind of just filler and useless anyway.
Arming Rockwell, turning him from a global laughingstock into a credible threat, and setting the entire finale
in motion, thus directly precipitating Tony and Pepper's relationship, is "not going anywhere"?
I was incredibly excited to see the movie and after I did was extremely disappointed due to the flaws and poor execution the film had. It really did have a "Spider-Man 3" vibe to it where there was too much going on that bogged down the main plot of the film.
Good grief. I can understand why many don't like it as much as I do - I think it's at least as good as the first, a bit less even but more ambitious - but to compare it to S-M3
is going way
over the top, imho.