I thought Civil War was great. It started to tackle a big "what if" in comics that was never really answered. What if a superhero screwed up and not only got themselves killed but a bunch of those around them. That's the spark. The fire is the reactions of the different heroes as to how to fix the problem. I thought it was interesting to see Captain America become an outlaw because he believed that registering was unconstitutional and he stood up for that belief.