Very cool! In the first Avengers movie, someone ran a property insurance program to see how much money would be needed to reconstruct New York City after all the events in the movie occurred. They figured about $160 billion would do it. Later, for Man of Steel (Superman), they ran it again and figured it would take about $700 billion. For Avengers – Age of Ultron? Whooo-weeee!!!!! Dunno, but it would add up to WAY more! Civilian casualties? There would have been some, but the heroes make very determined attempts to see to it that casualties would be minimal.
I described how an old comic series featured an Iron Man who assumes the role of the villain (Machine Man takes place in what was then the far, far future of 2020) and someone asked if the comics featured anyone going the other way, from villain to hero. As a matter of fact, this second Avengers movie features just such a transformation.
Interesting changes in some of the characters from the way they are in the comics. The changes to their powers and origins are minor, but make good dramatic sense.