I communicated with someone who has seen the film and here is some information. I have full faith that the person has seen the film.
-The film is just under 2 hours long
-The film will be rated R
-The primary heroes are Athenians and not the Spartans. The Athenian's are farmers, teachers and herders, so they are not a military culture like Sparta. They won't have the six pack look like the Spartans
-The film takes place before, during and after the events of 300
-Sullivan Stapleton in the lead role does not have the presence of Gerard Butler because he does not have that great of a body. But his performance is still strong and badass
-The action is a lot better than the first movie (!!!!)
-The brutality and blood is much more than the first film
-There are so slow motion shots which made the first film famous
-Artemisia (Eva Green) has an explicit sex scene with Themistocles (Sullivan Stapleton). He told me it was all out with lots of nudity from Green and biting and slapping and Themistocles absolute pounds Artemisisa as she makes him an offer to be a Persian General.
And now a spoiler laden plot rub-down