Since you brought up Man of Steel I should warn you it's currently sitting at a 69% approval rating on RT, 54% for "Top Critics". I'm thinking this may not be the big creative hit that Superman fans have wanted (Imagine, 2 within ten years of each other).
http://www.rottentomatoes.com/m/superman_man_of_steel/
I'm curious if that will have any bearing on all the kiddies who just got out of school for summer. I've also found very little correlation between a critic's opinion/approval rating of a movie and my enjoyment of a movie. Do you find that as well?