Very much so. Remember, in the original movie Klaatu did not care if we blew ourselves up in an atomic war. All he was concerned with was that we did not spread our violence out into the galaxy.
If I were to be the one writing the new version, Klaastu's mission would be to ensure that our exsistence did not destablize the order of the galaxy. With our transmissions of radio and television going into space other races see our trend toward violence and start to question why they have to obey the laws.
By reducing the weapons tech of earth to pre-WWII levels the "Galactic Court" feels that a level playing field will allow us to destroy ourselves faster or force the nations to come together and achive some degree of peace. Either of which, they feel, would be better for the harmony and order of the galaxy. But the choice would be ours.
The upshot of the movie would be that by large the galaxy really does not care what we do to ourselves as long as peace can be kept everywhere else. They only noticed us when we started to be a threat to their way of life. And they have the force, and will, to do something about it.
And yes, it would be a morality story based on the events of the past 7 years.
