^But that's why movies have ratings -- to give people an indication about their content before
watching them. The official MPAA rating
for Justice League: The Flashpoint Paradox
reads "Rated PG-13 for sci-fi violence and action throughout."
If you don't want to be caught off-guard by the content of a movie -- or for your kids to be -- then you should pay attention to the rating information. That's what it's there for.