I wrote my love letter about Man of Steel in a review for TweakTown, and in my original draft I did ask about the damage of the city - and just the insurance companies would be scratching their heads at claims of an "alien attacked my apartment and it's now gone, there's no evidence", etc.
Well, BuzzFeed has worked with disaster experts Watson Technical Consulting to estimate the amount of damage that was done to Metropolis during Man of Steel's absolutely mind-blowing action set pieces would've really cost. They ran simulations on Manhattan and Chicago which gave them an idea of what the cost would've been. The WTC estimates that around 129,000 people would've been killed, over 250,000 left missing and over one million people injured in total.
As for the cost of the God vs. God fight between Superman and General Zod - which left me with goosebumps - we're looking at physical damage of around $700 billion (or $700,000,000,000). Compared to 9/11 which was $55 billion in damages. The WTC estimates that the entire economic impact of the two Kryptonian's to sit at around $2 trillion.