For it to be rated R it would have to show us deaths in very gory detail, have extreme drug use and graphic delete this post scenes. Sexual references can be found in some PG rated movies (think How to Lose a Guy in Ten Days) and implicit delete this post is permitted in M rated movies. As for deaths... well, how many James Bond movies are there where we see heaps of deaths and they don't get an R rating? Maybe it will be M rated... in Australia that means it's recommended for people over 15 years old... but here the fourth one was too and that didn't stop the kids from going in (and not necessarily with an adult, it's only the MA rated movies where they have to). So, in my opinion - we're safe.